The following tables present IEM computed monthly data summaries based on
daily data provided by or computed for the IEM. A download interface
exists for the daily summary information. The climatology is provided by the
nearest NCEI climate station (USW00023273) within the current 1991-2020
dataset.
To load shown data into Microsoft Excel,
highlight the table information with your mouse and then copy/paste into Excel.
Precipitation Totals [inch]
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1948
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.11
0.03
2.99
1949
1.29
1.44
3.12
0.07
0.77
0.00
0.00
0.01
0.00
0.04
0.68
2.57
1950
2.54
1.39
1.18
0.85
0.15
0.00
0.62
0.01
0.05
0.93
1.39
1.27
1951
1.84
1.88
0.18
1.50
0.01
0.02
0.01
0.01
0.06
0.61
0.99
3.60
1952
5.03
0.77
4.38
0.37
0.00
0.11
0.00
0.00
0.00
0.04
3.41
4.13
1953
1.27
0.00
0.91
0.81
0.02
0.08
0.00
0.00
0.02
0.01
1.97
0.28
1954
3.34
1.28
3.44
0.25
0.02
0.04
0.00
0.00
0.00
0.00
0.78
1.88
1955
4.41
1.22
0.28
2.20
0.46
0.00
0.00
0.00
0.00
0.00
1.59
4.82
1956
2.54
0.66
0.00
1.99
0.45
0.00
0.02
0.00
0.00
0.81
0.00
0.36
1957
2.13
1.93
0.52
0.94
1.03
0.26
0.02
0.01
0.02
1.18
0.36
2.12
1958
2.46
4.67
4.51
4.41
0.21
0.00
0.00
0.00
1.57
0.00
0.24
0.16
1959
2.02
4.37
0.00
0.26
0.00
0.00
0.00
0.00
0.20
0.00
0.00
0.45
1960
3.17
4.00
0.91
2.05
0.00
0.00
0.00
0.00
0.00
2.07
2.83
0.80
1961
0.91
0.16
0.71
0.24
0.17
0.00
0.03
0.11
0.01
0.00
1.80
1.73
1962
2.01
9.69
1.23
0.04
0.10
0.03
0.00
0.00
0.00
0.50
0.00
0.26
1963
1.03
3.30
3.59
2.57
0.43
0.03
0.00
0.03
0.39
1.04
1.73
0.13
1964
1.23
0.05
2.37
0.35
0.27
0.09
0.06
0.10
0.00
0.71
1.71
0.94
1965
0.29
0.02
0.32
0.75
0.00
0.00
0.00
0.00
0.00
0.00
0.69
0.35
1966
0.03
0.22
0.00
0.00
0.00
0.02
0.00
0.00
0.02
0.00
0.46
0.67
1967
0.57
0.00
0.69
0.86
0.08
0.05
0.00
0.00
0.02
0.00
0.33
0.19
1968
0.15
0.25
0.45
0.39
0.00
0.00
0.00
0.00
0.00
0.35
0.14
0.46
1969
1.76
2.27
0.10
0.84
0.00
0.00
0.00
0.00
0.00
0.05
0.32
0.07
1970
0.32
0.80
0.69
0.00
0.00
0.03
0.00
0.00
0.00
0.00
0.83
0.79
1971
0.02
0.03
0.08
0.08
0.18
0.00
0.00
0.00
0.00
0.01
0.07
0.66
1972
0.02
0.05
0.00
0.09
0.00
0.00
0.01
0.00
0.00
0.03
0.93
0.23
1973
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1974
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1975
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1976
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1977
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1978
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1979
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1980
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1981
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1982
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1983
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1984
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1985
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1986
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1987
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1988
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1989
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1990
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1991
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1992
2.15
5.73
2.25
0.00
0.00
0.00
0.40
0.00
0.00
0.45
0.01
2.80
1993
5.46
3.91
3.54
0.04
0.21
0.12
0.00
0.00
0.01
0.40
0.76
1.77
1994
1.95
3.49
2.15
1.03
0.56
0.00
0.00
0.00
0.06
0.44
1.72
1.12
1995
11.78
1.92
7.72
0.39
0.46
0.86
0.00
0.00
0.00
0.01
0.32
1.44
1996
2.02
7.19
1.17
0.59
0.32
0.00
0.00
0.05
0.05
1.54
1.59
3.36
1997
3.49
0.12
0.05
0.03
0.00
0.01
0.04
0.04
0.77
0.14
4.29
2.70
1998
3.77
11.52
3.61
2.56
3.20
0.05
0.05
0.03
0.33
0.31
2.48
0.59
1999
1.75
0.68
5.49
2.38
0.04
0.02
0.01
0.06
0.17
0.10
1.44
0.06
2000
1.56
7.31
1.31
2.83
0.09
0.13
0.00
0.01
0.00
0.80
0.00
0.06
2001
3.03
2.65
3.66
0.62
0.01
0.00
0.01
0.01
0.00
0.33
2.21
1.33
2002
1.18
0.37
0.75
0.24
0.09
0.00
0.01
0.03
0.01
0.06
2.31
4.27
2003
0.22
1.84
1.51
1.15
1.08
0.01
0.02
0.00
0.00
0.34
1.48
1.29
2004
0.69
4.40
0.57
0.00
0.00
0.01
0.00
0.00
0.00
2.32
0.69
3.95
2005
4.20
3.70
3.27
0.48
0.89
0.00
0.00
0.00
0.04
0.70
1.06
2.11
2006
3.63
0.93
3.57
3.89
1.36
0.00
0.00
0.00
0.00
0.34
0.36
1.17
2007
0.80
1.62
0.18
0.60
0.04
0.00
0.00
0.02
0.01
0.57
0.03
1.86
2008
7.01
1.85
0.01
0.21
0.01
0.00
0.00
0.00
0.00
0.14
2.35
0.59
2009
0.17
4.68
0.69
0.10
0.08
0.98
0.00
0.01
0.01
1.57
0.00
2.53
2010
5.77
3.36
0.61
2.15
0.31
0.00
0.03
0.13
0.00
1.69
1.69
8.07
2011
1.08
3.85
4.48
0.16
1.36
0.53
0.00
0.00
0.09
0.76
1.52
0.17
2012
1.83
0.37
2.73
2.33
0.02
0.01
0.01
0.03
0.24
0.23
0.83
2.87
2013
0.83
1.20
0.84
0.18
0.04
0.00
0.01
0.99
0.00
0.18
0.13
0.18
2014
0.01
1.88
1.27
0.78
0.01
0.00
0.00
0.00
0.00
1.07
0.25
1.37
2015
0.32
0.52
0.30
0.67
0.24
0.03
0.14
0.00
0.09
0.07
0.69
1.12
2016
2.93
0.35
3.08
0.52
0.24
0.00
0.00
0.00
0.00
1.28
1.30
2.22
2017
5.84
5.44
0.84
1.18
0.34
0.00
0.00
0.00
0.47
0.03
0.06
0.03
2018
1.90
0.14
3.40
0.41
0.00
0.00
0.00
0.00
0.00
0.35
1.46
0.93
2019
4.73
3.69
3.31
0.30
0.91
0.00
0.00
0.00
0.00
0.00
1.98
2.18
2020
0.63
0.00
3.81
1.79
0.14
0.08
0.00
0.05
0.00
0.00
0.25
1.52
2021
4.13
0.18
0.78
0.00
0.01
0.00
0.00
0.00
0.01
1.29
0.11
4.69
2022
0.17
0.07
1.07
0.39
0.00
0.00
0.00
0.00
1.84
0.00
0.99
4.96
2023
7.40
3.78
6.05
0.00
0.29
0.36
0.00
0.22
0.12
0.00
0.35
2.95
2024
1.73
5.90
3.59
2.54
0.12
0.00
0.00
0.00
0.04
0.00
1.16
0.38
2025
0.24
2.26
2.48
0.33
0.00
0.00
M
M
M
M
M
M
NCEI Climatology
2.74
2.95
2.56
0.93
0.36
0.06
0.03
0.01
0.07
0.54
1.12
2.05
Average Wind Speed [MPH]
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1948
8.0
9.5
9.6
9.3
10.0
7.8
7.1
6.1
6.5
7.6
10.2
10.4
1949
9.3
8.6
10.6
7.9
8.8
8.2
7.1
7.1
6.4
7.3
8.3
9.6
1950
8.3
8.5
10.0
8.4
7.7
8.5
6.5
6.6
6.2
5.8
7.2
6.3
1951
7.5
7.9
7.9
6.1
7.0
6.5
5.9
5.5
5.2
7.7
7.4
7.9
1952
8.8
7.5
8.4
7.6
6.6
7.5
5.7
5.2
5.2
4.5
7.3
8.0
1953
8.1
8.8
8.2
7.2
8.7
8.1
5.8
6.2
6.1
7.6
8.0
8.8
1954
7.9
8.6
8.2
6.9
7.4
8.0
5.9
6.6
6.4
6.4
6.4
6.1
1955
5.8
6.4
7.4
8.9
7.5
8.1
7.5
5.5
5.8
5.8
5.9
7.2
1956
5.8
6.3
8.6
8.0
7.6
8.0
7.3
6.7
6.3
6.3
5.6
5.7
1957
6.4
6.2
8.3
7.6
8.2
8.1
7.0
6.5
5.4
5.9
4.4
5.0
1958
4.6
5.6
6.3
8.4
5.7
7.4
5.1
5.9
6.1
5.0
6.2
4.3
1959
7.0
7.3
8.7
7.1
10.5
8.8
7.1
7.1
7.3
6.9
5.6
6.6
1960
6.4
7.4
7.4
9.7
11.2
7.6
6.6
6.5
5.6
6.5
6.9
5.0
1961
5.4
8.3
9.7
9.4
10.9
8.4
7.4
7.0
6.3
6.5
7.2
5.3
1962
4.2
4.8
8.3
9.0
10.4
8.2
6.8
6.8
6.1
6.0
6.1
4.8
1963
5.3
6.5
8.7
10.1
8.8
9.4
8.1
6.7
6.1
6.2
7.3
6.1
1964
8.5
8.3
9.4
9.3
9.7
10.1
8.3
7.6
7.6
6.1
7.3
8.0
1965
8.3
7.9
8.0
8.8
M
M
M
M
M
7.6
7.7
7.1
1966
8.1
6.8
8.7
8.0
M
M
M
M
M
6.9
6.5
7.3
1967
8.4
7.5
8.9
9.3
M
M
M
M
M
9.4
6.0
7.1
1968
5.8
6.8
8.3
8.7
M
M
M
M
M
6.3
7.9
7.9
1969
8.8
9.0
8.4
9.3
M
M
M
M
M
8.4
7.0
7.1
1970
7.5
7.9
8.3
10.7
M
M
M
M
M
8.8
8.3
7.7
1971
7.1
9.2
10.6
11.4
M
M
M
M
M
12.6
8.2
9.2
1972
9.0
8.4
10.1
10.4
M
M
M
M
M
9.4
8.4
7.2
1973
7.5
8.5
8.9
8.2
7.7
8.4
7.9
7.7
8.4
7.9
8.0
7.9
1974
7.9
8.6
8.5
9.0
8.9
8.9
8.1
7.8
6.4
6.2
7.5
8.4
1975
7.4
7.8
9.6
8.5
8.2
8.4
7.7
6.7
6.0
7.4
8.3
6.3
1976
6.6
7.9
8.8
8.9
8.6
8.8
7.7
7.8
5.9
5.6
5.9
5.9
1977
6.0
7.5
9.4
8.3
9.8
7.6
7.4
7.3
6.9
6.8
8.6
7.9
1978
7.3
7.1
8.1
8.2
8.2
8.0
7.4
7.3
6.5
5.4
6.5
5.7
1979
6.5
6.8
6.7
8.9
7.5
7.8
6.9
7.1
5.8
7.0
6.3
6.4
1980
5.9
7.9
8.6
8.5
9.0
9.8
6.7
6.5
6.1
5.7
6.2
5.5
1981
6.2
6.9
7.9
7.7
8.7
7.8
6.3
6.6
7.2
8.1
7.2
7.0
1982
7.2
6.1
8.0
8.8
8.0
9.1
7.8
7.2
6.6
6.0
5.3
6.1
1983
6.7
6.9
7.1
7.6
8.9
8.5
7.7
5.5
5.2
5.5
5.8
6.2
1984
5.2
7.1
8.0
9.7
9.6
8.3
6.3
6.5
5.8
7.8
6.6
6.8
1985
5.5
6.9
8.3
7.6
8.8
7.1
7.1
7.0
7.4
7.3
7.3
6.0
1986
6.4
8.3
6.8
7.7
7.6
7.4
6.3
6.0
7.0
6.6
7.2
6.1
1987
7.3
7.2
7.5
7.5
7.7
7.1
6.9
6.4
6.4
5.9
7.0
8.4
1988
6.9
7.8
9.7
8.6
9.8
8.1
6.9
6.9
6.5
6.3
8.0
6.8
1989
7.1
7.2
9.3
8.2
10.5
9.4
8.4
7.6
7.4
7.4
6.0
5.7
1990
7.7
8.1
8.0
9.2
9.2
8.4
7.6
8.0
7.5
6.4
6.7
6.9
1991
6.8
7.0
9.4
10.1
9.9
8.1
6.7
7.5
6.0
6.0
6.9
6.2
1992
6.2
7.0
7.2
7.9
7.0
8.1
7.1
7.0
6.9
6.6
6.7
6.1
1993
7.0
7.5
7.7
10.6
9.0
9.6
7.3
7.9
7.1
6.5
6.8
6.4
1994
6.4
7.6
7.7
9.5
8.5
8.5
8.0
7.1
7.3
7.5
7.3
6.3
1995
8.4
6.0
8.5
8.5
9.5
9.1
8.3
7.1
7.5
6.9
6.5
7.7
1996
7.3
7.2
7.1
9.1
9.4
7.7
6.1
5.6
5.8
7.3
6.0
6.2
1997
6.3
7.3
6.6
8.9
8.6
8.8
6.6
7.2
6.4
7.0
5.5
6.3
1998
5.6
8.5
7.0
6.7
8.3
7.3
6.6
5.4
5.6
6.7
6.6
6.0
1999
5.3
7.0
8.5
7.8
9.1
7.5
6.8
6.7
5.1
5.0
5.2
6.4
2000
6.0
6.9
8.3
8.3
8.4
6.8
7.2
5.7
5.9
5.3
5.8
4.9
2001
5.6
6.8
7.8
7.8
5.8
6.5
6.5
6.2
5.4
4.4
5.5
5.8
2002
5.5
5.8
7.2
8.1
8.6
8.0
6.5
5.9
5.0
4.6
6.0
5.2
2003
4.8
6.1
8.0
7.7
8.9
7.4
5.9
6.7
5.7
5.3
5.5
5.6
2004
5.5
6.4
6.4
7.0
9.0
8.1
6.5
6.3
6.1
5.9
5.3
5.9
2005
5.4
6.0
6.3
8.2
8.4
8.9
6.5
5.2
5.9
6.0
5.5
5.1
2006
6.4
5.3
6.6
6.3
6.9
6.5
4.9
5.2
5.2
5.3
7.1
6.4
2007
6.0
6.6
6.7
8.9
8.1
7.3
6.5
5.4
6.3
6.6
4.6
6.7
2008
7.4
6.6
8.4
9.0
7.4
7.4
6.0
5.2
4.6
5.6
6.5
5.1
2009
4.8
5.5
9.1
8.1
7.6
6.7
5.6
5.4
5.0
7.0
5.5
5.0
2010
5.3
5.7
6.8
7.7
9.0
8.2
5.9
5.8
5.3
5.0
6.8
7.2
2011
5.2
6.0
7.9
8.4
8.7
7.3
5.9
5.6
4.9
5.4
5.0
4.5
2012
5.6
7.1
6.5
7.9
8.2
8.0
5.9
5.0
4.2
5.8
5.0
5.1
2013
4.4
5.3
6.2
7.9
9.5
7.0
5.7
6.0
6.4
4.5
4.6
4.2
2014
5.0
7.1
6.5
7.2
8.7
6.9
5.9
5.7
6.2
6.3
5.5
6.3
2015
3.9
5.6
6.3
8.1
8.3
7.0
7.0
7.1
5.4
6.0
6.0
6.2
2016
6.0
6.4
8.3
8.1
7.4
7.1
6.0
6.1
6.1
6.7
5.3
5.0
2017
6.4
7.3
7.6
9.4
8.2
7.9
5.8
5.8
6.7
6.1
5.3
4.7
2018
5.7
6.3
6.4
8.5
8.2
7.9
6.0
5.9
5.8
6.0
5.2
5.9
2019
6.3
8.1
6.6
6.3
7.4
6.0
6.4
5.5
6.6
6.2
5.3
6.0
2020
7.2
5.9
6.5
7.5
8.1
7.3
6.2
5.3
4.3
4.2
5.8
5.8
2021
6.5
8.1
6.8
7.7
8.3
7.5
5.6
5.2
4.9
6.4
5.2
5.7
2022
4.5
6.1
7.3
9.6
10.0
7.2
6.5
5.8
5.1
4.8
5.1
4.7
2023
7.0
6.5
7.7
8.3
7.3
7.3
5.7
6.1
6.3
5.6
5.6
5.4
2024
6.1
6.0
6.7
7.9
7.2
7.3
5.7
5.6
5.1
4.8
5.4
5.1
2025
5.4
7.9
7.7
7.0
8.2
7.0
M
M
M
M
M
M
NCEI Climatology
M
M
M
M
M
M
M
M
M
M
M
M
Average Daily High Temperature [F]
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1948
66.58
61.10
61.03
64.80
67.00
69.47
69.71
70.77
73.33
70.19
69.40
59.29
1949
53.35
57.11
60.55
68.30
67.48
69.90
68.61
70.32
73.60
69.68
75.30
62.74
1950
55.77
63.14
65.26
67.33
64.10
67.87
71.87
70.48
73.17
73.61
70.90
66.19
1951
61.35
62.86
66.06
62.87
67.71
67.27
69.90
70.10
71.97
76.45
67.50
59.19
1952
57.58
63.45
59.32
66.73
68.52
67.27
71.03
70.52
73.33
66.68
65.87
60.68
1953
66.23
66.39
63.97
62.27
67.65
68.87
73.48
69.94
72.30
74.00
67.80
66.26
1954
59.35
70.96
61.00
65.57
67.29
69.67
72.90
70.29
72.40
72.39
70.90
63.19
1955
57.35
59.75
64.16
59.90
62.61
65.10
65.84
69.45
69.43
70.52
67.97
61.10
1956
60.00
59.07
64.29
60.73
65.94
67.97
66.97
67.35
74.00
67.58
75.07
68.94
1957
57.39
62.00
62.61
64.87
66.90
72.03
73.90
71.81
74.73
71.97
67.53
67.81
1958
65.48
64.46
61.00
67.60
68.23
69.87
69.52
73.74
78.13
73.87
70.87
71.61
1959
65.97
62.11
70.35
68.27
65.23
69.03
73.48
72.65
71.50
76.77
74.30
67.71
1960
59.32
61.34
64.74
67.53
66.06
69.33
70.97
69.10
71.60
69.35
64.30
64.52
1961
69.45
65.54
62.58
66.50
62.84
68.67
72.65
71.81
72.00
72.84
65.77
62.81
1962
64.42
57.43
59.48
66.77
62.94
65.90
68.03
72.32
68.90
70.45
67.20
65.10
1963
61.45
68.46
61.90
61.87
63.84
66.00
68.23
71.84
75.50
72.35
67.67
67.06
1964
62.26
65.62
62.19
63.47
62.87
66.93
69.90
70.90
71.20
72.32
63.53
60.71
1965
62.90
62.57
61.90
64.37
65.35
66.00
70.10
73.81
72.40
79.03
66.07
61.10
1966
60.84
59.96
65.19
68.87
66.58
71.47
70.42
72.19
73.47
74.58
66.00
61.81
1967
63.57
65.71
60.19
58.60
67.61
66.64
73.74
74.29
74.97
76.74
68.74
61.61
1968
62.90
65.83
66.39
67.47
68.58
70.97
72.81
74.42
74.93
72.61
69.37
61.71
1969
61.87
59.14
62.45
64.17
67.00
67.63
71.01
72.52
71.40
74.55
73.23
65.23
1970
64.13
67.61
67.06
67.20
71.03
67.48
70.87
69.16
74.83
69.19
66.67
59.45
1971
61.81
62.21
62.71
62.40
62.74
67.57
70.23
74.68
74.73
69.52
63.33
56.58
1972
60.10
64.83
67.58
67.83
67.35
69.62
72.97
72.81
71.83
69.97
63.83
59.45
1973
57.87
61.75
58.71
65.20
68.68
75.30
71.26
70.61
72.20
73.68
62.60
62.29
1974
58.48
63.50
60.03
65.53
65.06
69.83
73.00
72.55
71.33
70.65
68.30
62.29
1975
64.29
61.04
59.19
60.07
64.90
68.53
70.45
72.29
71.53
70.87
68.50
65.16
1976
69.84
64.03
63.81
62.63
66.87
75.20
72.52
73.68
73.40
73.68
74.57
69.42
1977
63.71
69.43
62.03
67.03
64.97
69.13
73.58
74.00
74.43
72.16
73.70
66.68
1978
63.26
62.68
66.06
62.70
72.55
69.97
70.52
74.10
78.13
71.29
65.73
61.77
1979
58.42
60.11
62.97
65.97
69.81
71.37
72.55
72.84
78.10
73.52
69.30
68.84
1980
64.74
66.69
63.97
67.73
64.74
69.00
71.97
71.42
72.23
73.58
70.87
70.90
1981
65.58
65.75
63.00
66.57
67.00
76.67
72.87
72.58
72.03
71.55
68.00
64.65
1982
61.23
65.43
61.71
66.97
66.00
67.13
71.35
72.68
75.40
75.65
66.57
63.58
1983
66.58
64.07
63.84
65.37
68.65
71.17
76.87
78.45
79.67
78.61
67.00
63.97
1984
65.65
64.59
68.58
66.83
74.06
70.63
76.45
78.39
84.63
72.03
66.30
61.94
1985
63.10
65.43
62.58
70.40
67.94
74.97
78.23
74.39
73.70
73.42
64.63
67.19
1986
69.16
65.32
65.35
67.30
68.45
69.80
72.87
72.52
70.33
72.90
72.57
64.29
1987
60.74
65.14
64.29
70.07
68.58
69.20
69.84
71.65
72.10
73.45
66.47
58.97
1988
62.65
69.93
70.13
67.80
67.55
69.60
74.29
73.16
71.57
70.06
66.07
62.03
1989
62.39
59.18
65.48
71.20
66.29
70.53
72.13
70.48
70.50
74.10
73.73
70.61
1990
64.16
60.75
62.68
68.50
66.55
70.33
72.68
73.90
73.40
75.10
71.20
62.81
1991
63.45
67.68
58.55
64.40
63.61
66.60
71.13
70.77
71.40
71.94
71.87
65.58
1992
66.23
67.55
64.32
71.93
69.58
69.30
72.84
74.58
73.67
74.10
71.90
62.06
1993
62.55
62.39
67.58
69.57
72.10
74.00
72.19
73.48
73.37
74.06
70.67
64.23
1994
66.90
62.21
67.06
65.23
67.26
71.07
68.71
72.94
72.13
73.00
62.97
61.71
1995
60.68
66.86
65.13
66.40
64.52
68.97
73.90
72.39
72.97
75.42
71.67
63.68
1996
63.81
64.45
65.55
73.03
71.06
71.40
72.61
71.77
71.13
71.00
67.05
62.37
1997
60.32
62.95
67.75
68.02
74.00
70.53
71.97
75.58
79.50
75.74
68.80
61.97
1998
61.06
62.00
67.68
66.10
65.81
68.03
72.16
74.71
72.93
71.84
65.10
61.13
1999
63.65
61.57
58.81
61.43
63.84
65.70
70.45
69.68
69.50
74.06
67.13
68.00
2000
62.35
61.48
64.34
67.01
68.97
70.98
69.45
71.71
74.50
67.94
65.00
67.45
2001
62.41
61.11
63.00
62.74
73.17
75.35
72.82
71.25
72.74
71.10
66.10
60.71
2002
60.50
68.24
64.52
65.80
66.13
69.40
73.03
70.97
73.87
67.61
72.30
62.32
2003
68.81
64.14
67.65
65.33
69.77
70.23
74.32
74.29
73.17
75.61
66.00
62.45
2004
61.61
60.86
69.48
69.57
70.68
70.00
73.42
73.90
77.57
69.97
66.30
64.29
2005
63.32
63.25
65.61
67.53
71.10
70.30
72.58
73.23
71.77
72.61
72.97
65.26
2006
63.68
67.61
60.13
64.83
70.58
75.00
78.84
74.74
75.97
74.81
73.57
67.84
2007
64.87
66.21
71.97
70.07
70.06
71.00
73.48
74.29
75.93
73.77
70.70
63.68
2008
61.81
63.69
66.45
67.10
68.16
74.00
72.58
74.10
74.20
77.42
72.90
60.74
2009
68.95
62.94
64.83
68.41
69.58
70.52
71.54
74.44
75.70
73.72
71.27
61.54
2010
64.27
63.27
66.40
65.64
67.82
67.78
68.46
69.98
74.91
70.40
67.12
61.91
2011
65.89
62.24
64.88
67.66
68.98
68.56
73.05
71.42
73.73
75.59
68.01
64.58
2012
66.93
66.16
65.95
68.51
69.00
71.17
71.64
73.87
72.53
77.16
72.03
61.87
2013
63.41
63.86
68.71
70.16
72.43
74.10
74.92
74.68
78.20
73.16
72.97
69.45
2014
74.26
69.50
71.67
72.35
76.74
72.10
77.58
77.39
77.87
82.19
74.57
66.81
2015
72.16
71.54
76.52
71.47
67.61
74.16
78.05
79.19
83.93
81.03
70.57
64.23
2016
64.42
75.21
68.70
73.98
68.48
73.53
73.00
70.81
76.20
74.94
70.33
62.25
2017
60.84
61.25
69.65
70.60
69.58
72.17
75.35
75.48
80.07
80.29
73.58
71.87
2018
69.81
68.61
65.48
69.00
67.68
72.27
77.68
77.03
74.37
78.03
74.73
66.13
2019
65.39
59.54
66.63
70.43
69.06
73.63
73.45
76.19
80.70
79.45
70.07
63.77
2020
65.13
68.90
62.94
67.23
74.68
74.83
73.35
77.07
77.07
79.93
71.10
67.38
2021
65.99
65.11
63.10
64.70
66.77
73.03
73.13
73.58
72.83
72.86
74.03
60.34
2022
66.10
68.64
67.55
69.30
68.32
73.63
72.00
73.65
77.87
70.48
66.49
61.58
2023
59.89
60.57
59.43
64.27
65.55
67.33
72.97
75.13
73.03
76.06
72.57
67.48
2024
63.45
62.83
64.29
66.00
66.71
71.03
73.61
74.65
73.57
75.00
68.03
66.97
2025
65.58
66.50
63.42
67.17
68.90
68.18
M
M
M
M
M
M
NCEI Climatology
64.70
64.81
66.30
68.10
69.30
71.29
73.30
73.79
75.01
74.59
70.00
64.30
Average Daily Low Temperature [F]
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1948
39.65
38.03
40.10
45.83
46.26
52.23
51.97
52.55
50.07
48.26
41.97
38.00
1949
33.45
37.71
43.35
45.60
48.52
51.53
52.68
52.06
50.50
43.58
45.90
39.65
1950
36.65
41.54
42.84
45.57
47.23
49.10
55.61
52.77
52.83
48.52
49.67
45.71
1951
40.55
39.39
40.26
46.47
47.10
51.83
52.68
53.90
53.50
49.23
44.97
39.90
1952
39.74
43.52
41.45
47.13
47.10
48.47
52.52
51.74
51.10
50.23
42.77
41.52
1953
45.77
39.14
40.39
43.10
45.03
46.80
52.71
52.32
53.17
45.90
45.93
39.39
1954
40.10
42.61
41.81
47.20
47.65
47.57
53.19
52.90
49.33
44.45
44.83
40.39
1955
35.77
37.32
41.32
42.23
47.10
49.27
50.26
52.35
51.67
48.58
42.57
45.74
1956
43.23
36.10
41.39
43.63
48.71
49.10
53.29
51.23
51.57
47.81
40.80
38.16
1957
36.77
47.36
44.48
44.37
49.84
52.43
54.42
53.13
54.97
51.10
42.50
42.65
1958
41.45
46.57
42.74
46.73
50.13
51.97
55.32
58.77
55.70
51.81
43.47
43.06
1959
44.19
40.61
44.65
50.07
47.68
50.20
55.39
55.94
53.77
50.61
44.30
41.00
1960
40.35
42.24
45.81
45.73
47.13
53.63
54.26
52.74
52.50
49.10
43.57
37.97
1961
40.03
43.50
43.06
44.60
46.87
52.40
54.23
56.65
52.67
48.52
41.67
40.48
1962
38.10
43.50
41.00
46.37
46.16
50.37
52.58
53.39
52.17
49.39
45.23
41.45
1963
38.55
48.89
41.29
43.80
50.35
51.70
52.52
53.81
54.93
52.81
44.43
34.81
1964
35.26
33.97
36.61
41.20
43.71
48.87
50.84
52.97
50.47
49.29
40.53
43.74
1965
41.97
38.57
43.58
45.80
46.32
49.83
52.61
54.23
52.10
48.84
46.67
37.06
1966
36.74
35.82
42.90
46.83
50.13
49.87
52.42
54.57
53.40
49.26
46.67
39.39
1967
39.61
38.57
42.42
41.17
47.81
50.75
53.65
55.97
56.73
48.23
47.97
38.35
1968
39.42
48.72
42.32
44.63
48.87
52.30
55.16
55.35
53.20
51.35
46.64
38.35
1969
45.35
42.96
40.10
44.40
49.32
54.10
54.52
52.29
54.07
47.10
45.70
40.90
1970
45.13
44.18
43.45
40.17
48.87
51.37
53.00
51.52
48.57
47.84
45.70
39.97
1971
39.32
38.54
40.68
41.57
46.23
49.83
52.94
55.77
52.40
42.52
39.53
35.74
1972
37.16
42.24
44.61
44.23
47.06
52.43
54.77
54.65
53.37
51.52
42.27
37.68
1973
37.39
44.57
40.10
43.73
50.39
52.97
52.61
53.06
53.07
48.45
42.80
41.35
1974
41.90
38.54
46.23
43.23
45.23
51.07
53.87
55.45
53.13
49.29
42.77
38.32
1975
37.16
40.82
41.81
40.47
47.45
52.03
52.68
53.61
53.20
46.35
40.20
37.68
1976
36.29
41.66
41.77
41.67
48.61
50.57
54.65
56.00
57.00
51.32
43.53
35.03
1977
38.42
40.57
36.97
43.13
45.58
52.40
52.52
56.71
53.70
48.90
47.40
48.48
1978
46.58
45.25
49.74
45.63
46.84
49.47
51.71
53.71
51.53
49.19
39.33
33.87
1979
39.68
38.89
42.87
42.80
48.35
50.67
53.74
54.97
52.93
49.94
40.60
39.19
1980
45.19
44.86
41.61
45.80
47.13
48.27
54.61
54.45
52.43
47.06
40.10
40.06
1981
42.90
43.54
43.71
44.72
47.52
52.47
54.48
54.19
53.27
44.97
46.40
41.19
1982
35.71
43.89
42.35
43.37
48.94
51.67
52.84
53.65
54.17
48.45
41.50
39.42
1983
40.32
43.79
46.00
44.40
49.06
53.43
55.48
58.77
60.07
53.45
45.83
43.84
1984
40.94
38.76
42.10
41.17
47.77
51.47
57.68
57.61
58.33
48.26
42.13
39.35
1985
36.74
39.96
40.74
46.47
48.00
52.67
58.06
53.19
52.97
47.65
41.63
39.39
1986
43.52
44.71
45.23
43.53
44.94
50.40
53.06
54.45
50.37
47.61
41.77
37.48
1987
35.13
39.29
40.06
44.20
49.74
50.90
51.35
52.87
52.23
53.71
43.67
38.16
1988
38.58
40.38
42.65
45.47
45.52
49.73
54.68
55.03
50.83
51.55
43.67
38.48
1989
35.58
38.96
44.39
47.87
47.52
51.07
51.71
53.48
52.00
49.68
44.07
38.74
1990
38.39
39.25
43.97
48.33
48.23
50.20
55.26
56.55
53.70
48.77
41.50
34.74
1991
41.10
42.93
41.81
44.37
44.23
49.43
55.10
55.19
54.33
49.35
42.50
39.06
1992
38.58
46.55
47.19
48.10
52.48
53.07
55.81
54.00
53.70
51.48
42.73
38.19
1993
42.45
43.18
47.00
45.80
48.74
51.27
55.13
55.90
51.90
50.48
43.50
39.29
1994
38.90
41.46
45.48
45.90
48.10
48.17
53.48
53.19
52.67
47.19
37.10
38.71
1995
46.26
47.39
45.45
43.17
49.00
49.80
53.48
52.65
52.00
49.81
46.57
43.16
1996
40.90
47.14
44.23
47.33
48.84
50.47
53.37
52.94
51.77
48.43
45.23
44.14
1997
44.24
39.57
43.26
43.45
50.65
52.30
54.65
57.37
56.40
48.77
47.50
38.58
1998
42.65
45.75
49.39
45.40
47.81
52.73
54.87
55.94
54.77
46.10
42.20
35.19
1999
39.52
39.82
40.48
41.10
45.65
48.73
52.65
52.42
52.17
48.97
44.23
38.71
2000
42.97
45.24
43.32
46.09
47.78
52.61
52.42
52.63
52.87
49.81
38.53
40.29
2001
35.87
39.65
46.74
42.38
49.49
49.53
54.02
53.02
52.83
49.91
46.57
39.09
2002
35.61
39.00
39.35
45.40
46.19
49.80
52.87
52.81
51.33
47.65
44.73
41.74
2003
43.58
40.50
41.87
42.90
47.06
52.13
52.61
54.90
53.07
48.87
42.10
39.61
2004
37.61
39.45
46.71
44.20
47.26
50.60
54.26
55.35
51.63
47.71
39.50
38.97
2005
40.39
44.93
45.49
42.03
48.65
50.13
53.79
54.03
49.97
47.29
44.90
42.29
2006
39.45
38.71
38.97
48.13
48.84
52.25
55.45
55.35
54.90
48.97
47.67
39.71
2007
37.19
44.29
46.55
46.53
47.76
50.57
54.35
54.85
52.70
49.45
44.53
37.87
2008
40.86
41.84
40.32
40.41
46.24
49.59
53.99
53.86
52.35
48.10
47.53
37.00
2009
38.05
40.26
40.40
41.01
49.15
52.22
52.16
53.15
51.98
49.57
41.46
39.75
2010
41.51
42.39
41.28
43.12
45.58
48.52
51.77
52.07
50.98
51.11
40.69
44.01
2011
40.53
37.29
43.65
44.09
44.92
51.29
54.51
54.24
54.14
50.99
42.35
35.48
2012
38.39
40.09
40.90
44.81
46.90
49.85
54.02
53.66
53.27
51.19
46.07
41.32
2013
35.91
36.79
44.17
46.03
48.94
53.45
55.98
55.09
53.69
48.80
45.30
36.77
2014
43.03
45.55
48.33
48.33
51.19
53.87
59.37
59.41
57.59
55.03
49.20
47.68
2015
44.10
47.50
46.35
46.60
50.65
54.30
59.34
59.14
58.57
56.34
43.23
38.84
2016
45.81
44.21
47.84
48.25
50.31
51.07
52.72
53.85
51.96
49.83
43.87
40.74
2017
40.19
46.10
45.00
45.50
48.48
50.88
53.79
56.50
56.07
50.26
48.23
38.35
2018
44.88
38.46
44.20
46.90
50.10
51.40
56.79
56.01
53.95
50.77
46.60
43.15
2019
44.39
40.25
44.88
48.25
50.92
53.81
54.47
55.52
54.73
47.66
44.55
45.32
2020
41.74
41.28
44.42
46.59
49.61
52.52
54.44
56.54
54.29
53.46
42.03
39.87
2021
41.03
41.04
39.63
44.91
47.58
52.41
55.38
55.19
53.91
47.40
45.90
40.52
2022
39.61
37.43
42.35
46.07
46.35
50.85
54.01
54.77
57.01
50.28
38.97
42.30
2023
41.00
36.39
42.97
43.92
48.80
52.76
52.59
55.58
54.23
48.73
42.53
44.28
2024
42.31
43.31
43.51
45.26
48.52
51.77
53.45
53.16
53.13
50.00
40.37
41.65
2025
36.19
43.54
43.23
46.43
48.71
51.82
M
M
M
M
M
M
NCEI Climatology
41.00
42.54
44.30
45.40
48.69
51.60
54.91
55.10
53.70
49.80
44.30
40.11
Average Daily Temperature (high+low)/2 [F]
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1948
53.11
49.57
50.56
55.32
56.63
60.85
60.84
61.66
61.70
59.23
55.68
48.65
1949
43.40
47.41
51.95
56.95
58.00
60.72
60.65
61.19
62.05
56.63
60.60
51.19
1950
46.21
52.34
54.05
56.45
55.66
58.48
63.74
61.63
63.00
61.06
60.28
55.95
1951
50.95
51.12
53.16
54.67
57.40
59.55
61.29
62.00
62.73
62.84
56.23
49.55
1952
48.66
53.48
50.39
56.93
57.81
57.87
61.77
61.13
62.22
58.45
54.32
51.10
1953
56.00
52.77
52.18
52.68
56.34
57.83
63.10
61.13
62.73
59.95
56.87
52.82
1954
49.73
56.79
51.40
56.38
57.47
58.62
63.05
61.60
60.87
58.42
57.87
51.79
1955
46.56
48.54
52.74
51.07
54.85
57.18
58.05
60.90
60.55
59.55
55.27
53.42
1956
51.61
47.59
52.84
52.18
57.32
58.53
60.13
59.29
62.78
57.69
57.93
53.55
1957
47.08
54.68
53.55
54.62
58.37
62.23
64.16
62.47
64.85
61.53
55.02
55.23
1958
53.47
55.52
51.87
57.17
59.18
60.92
62.42
66.26
66.92
62.84
57.17
57.34
1959
55.08
51.36
57.50
59.17
56.45
59.62
64.44
64.29
62.63
63.69
59.30
54.35
1960
49.84
51.79
55.27
56.63
56.60
61.48
62.61
60.92
62.05
59.23
53.93
51.24
1961
54.74
54.52
52.82
55.55
54.85
60.53
63.44
64.23
62.33
60.68
53.72
51.65
1962
51.26
50.46
50.24
56.57
54.55
58.13
60.31
62.85
60.53
59.92
56.22
53.27
1963
50.00
58.68
51.60
52.83
57.10
58.85
60.37
62.82
65.22
62.58
56.05
50.94
1964
48.76
49.79
49.40
52.33
53.29
57.90
60.37
61.94
60.83
60.81
52.03
52.23
1965
52.44
50.57
52.74
55.08
55.84
57.92
61.35
64.02
62.25
63.94
56.37
49.08
1966
48.79
47.89
54.05
57.85
58.35
60.67
61.42
63.38
63.43
61.92
56.33
50.60
1967
51.59
52.14
51.31
49.88
57.71
58.70
63.69
65.13
65.85
62.48
58.36
49.98
1968
51.16
57.28
54.35
56.05
58.73
61.63
63.98
64.89
64.07
61.98
58.01
50.03
1969
53.61
51.05
51.27
54.28
58.16
60.87
62.76
62.40
62.73
60.82
59.47
53.06
1970
54.63
55.89
55.26
53.68
59.95
59.42
61.94
60.34
61.70
58.52
56.18
49.71
1971
50.56
50.38
51.69
51.98
54.48
58.70
61.58
65.23
63.57
56.02
51.43
46.16
1972
48.63
53.53
56.10
56.03
57.21
61.03
63.87
63.73
62.60
60.74
53.05
48.56
1973
47.63
53.16
49.40
54.47
59.53
64.13
61.94
61.84
62.63
61.06
52.70
51.82
1974
50.19
51.02
53.13
54.38
55.15
60.45
63.44
64.00
62.23
59.97
55.53
50.31
1975
50.73
50.93
50.50
50.27
56.18
60.28
61.56
62.95
62.37
58.61
54.35
51.42
1976
53.06
52.84
52.79
52.15
57.74
62.88
63.58
64.84
65.20
62.50
59.05
52.23
1977
51.06
55.00
49.50
55.08
55.27
60.77
63.05
65.35
64.07
60.53
60.55
57.58
1978
54.92
53.96
57.90
54.17
59.69
59.72
61.11
63.90
64.83
60.24
52.53
47.82
1979
49.05
49.50
52.92
54.38
59.08
61.02
63.15
63.90
65.52
61.73
54.95
54.02
1980
54.97
55.78
52.79
56.77
55.94
58.63
63.29
62.94
62.33
60.32
55.48
55.48
1981
54.24
54.64
53.35
55.64
57.26
64.57
63.68
63.39
62.65
58.26
57.20
52.92
1982
48.47
54.66
52.03
55.17
57.47
59.40
62.10
63.16
64.78
62.05
54.03
51.50
1983
53.45
53.93
54.92
54.88
58.85
62.30
66.18
68.61
69.87
66.03
56.42
53.90
1984
53.29
51.67
55.34
54.00
60.92
61.05
67.06
68.00
71.48
60.15
54.22
50.65
1985
49.92
52.70
51.66
58.43
57.97
63.82
68.15
63.79
63.33
60.53
53.13
53.29
1986
56.34
55.02
55.29
55.42
56.69
60.10
62.97
63.48
60.35
60.26
57.17
50.89
1987
47.94
52.21
52.18
57.13
59.16
60.05
60.60
62.26
62.17
63.58
55.07
48.56
1988
50.61
55.16
56.39
56.63
56.53
59.67
64.48
64.10
61.20
60.81
54.87
50.26
1989
48.98
49.07
54.94
59.53
56.90
60.80
61.92
61.98
61.25
61.89
58.90
54.68
1990
51.27
50.00
53.32
58.42
57.39
60.27
63.97
65.23
63.55
61.94
56.35
48.77
1991
52.27
55.30
50.18
54.38
53.92
58.02
63.11
62.98
62.87
60.65
57.18
52.32
1992
52.40
57.05
55.76
60.02
61.03
61.18
64.32
64.29
63.68
62.79
57.32
50.13
1993
52.50
52.79
57.29
57.68
60.42
62.63
63.66
64.69
62.63
62.27
57.08
51.76
1994
52.90
51.84
56.27
55.57
57.68
59.62
61.10
63.06
62.40
60.10
50.03
50.21
1995
53.47
57.12
55.29
54.78
56.76
59.38
63.69
62.52
62.48
62.61
59.12
53.42
1996
52.35
55.79
54.89
60.18
59.95
60.93
62.99
62.35
61.45
59.71
56.14
53.26
1997
52.28
51.26
55.51
55.74
62.32
61.42
63.31
66.48
67.95
62.26
58.15
50.27
1998
51.85
53.88
58.53
55.75
56.81
60.38
63.52
65.32
63.85
58.97
53.65
48.16
1999
51.58
50.70
49.65
51.27
54.74
57.22
61.55
61.05
60.83
61.52
55.68
53.35
2000
52.66
53.36
53.83
56.55
58.38
61.79
60.94
62.17
63.68
58.87
51.77
53.87
2001
49.14
50.38
54.87
52.56
61.33
62.44
63.42
62.14
62.78
60.50
56.34
49.90
2002
48.06
53.62
51.94
55.60
56.16
59.60
62.95
61.89
62.60
57.63
58.52
52.03
2003
56.19
52.32
54.76
54.12
58.42
61.18
63.47
64.60
63.12
62.24
54.05
51.03
2004
49.61
50.16
58.10
56.88
58.97
60.30
63.84
64.63
64.60
58.84
52.90
51.63
2005
51.85
54.09
55.55
54.78
59.87
60.22
63.19
63.63
60.87
59.95
58.93
53.77
2006
51.56
53.16
49.55
56.48
59.71
63.62
67.15
65.05
65.43
61.89
60.62
53.77
2007
51.03
55.25
59.26
58.30
58.91
60.78
63.92
64.57
64.32
61.61
57.62
50.77
2008
51.34
52.77
53.39
53.76
57.20
61.80
63.28
63.98
63.28
62.76
60.22
48.87
2009
53.50
51.60
52.62
54.71
59.37
61.37
61.85
63.79
63.84
61.65
56.37
50.64
2010
52.89
52.83
53.84
54.38
56.70
58.15
60.11
61.03
62.94
60.75
53.90
52.96
2011
53.21
49.77
54.26
55.88
56.95
59.93
63.78
62.83
63.94
63.29
55.18
50.03
2012
52.66
53.12
53.43
56.66
57.95
60.51
62.83
63.77
62.90
64.18
59.05
51.60
2013
49.66
50.32
56.44
58.09
60.69
63.77
65.45
64.89
65.95
60.98
59.13
53.11
2014
58.65
57.53
60.00
60.34
63.97
62.99
68.48
68.40
67.73
68.61
61.88
57.24
2015
58.13
59.52
61.44
59.03
59.13
64.23
68.69
69.17
71.25
68.68
56.90
51.53
2016
55.11
59.71
58.27
61.12
59.40
62.30
62.86
62.33
64.08
62.38
57.10
51.49
2017
50.52
53.67
57.32
58.05
59.03
61.52
64.57
65.99
68.07
65.28
60.91
55.11
2018
57.34
53.54
54.84
57.95
58.89
61.83
67.24
66.52
64.16
64.40
60.67
54.64
2019
54.89
49.89
55.76
59.34
59.99
63.72
63.96
65.85
67.72
63.55
57.31
54.55
2020
53.44
55.09
53.68
56.91
62.15
63.68
63.90
66.80
65.68
66.70
56.57
53.63
2021
53.51
53.07
51.36
54.81
57.18
62.72
64.25
64.38
63.37
60.13
59.97
50.43
2022
52.85
53.04
54.95
57.68
57.34
62.24
63.00
64.21
67.44
60.38
52.73
51.94
2023
50.45
48.48
51.20
54.09
57.17
60.05
62.78
65.35
63.63
62.40
57.55
55.88
2024
52.88
53.07
53.90
55.63
57.61
61.40
63.53
63.90
63.35
62.50
54.20
54.31
2025
50.89
55.02
53.32
56.80
58.81
60.00
M
M
M
M
M
M
NCEI Climatology
52.85
53.68
55.30
56.75
59.00
61.44
64.11
64.45
64.35
62.20
57.15
52.20
Average Relative Humidity [%]
This value is computed via a simple average of available observations weighted
by the duration between observations.
