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909
CDUS46 KMTR 200839
CLISFO
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
139 AM PDT TUE MAY 20 2025
...................................
...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR MAY 19 2025...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1927 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 70 1:32 PM 86 1952 69 1 69
1978
1983
MINIMUM 52 5:25 AM 42 1950 52 0 52
AVERAGE 61 60 1 61
PRECIPITATION (IN)
YESTERDAY 0.00 0.30 1961 0.01 -0.01 0.00
MONTH TO DATE 0.11 0.33 -0.22 0.95
SINCE OCT 1 16.11 19.24 -3.13 20.13
SINCE JAN 1 7.55 12.27 -4.72 14.80
SNOWFALL (IN)
YESTERDAY MM 0.0
MONTH TO DATE T
SINCE MAR 1 T
SINCE JUL 1 T
DEGREE DAYS
HEATING
YESTERDAY 4 5 -1 4
MONTH TO DATE 102 114 -12 89
SINCE MAR 1 656 644 12 578
SINCE JUL 1 2189 2323 -134 1719
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 2 0 2 10
SINCE MAR 1 5 6 -1 11
SINCE JAN 1 5 6 -1 11
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 20 RESULTANT WIND DIRECTION W (280)
HIGHEST WIND SPEED 44 HIGHEST WIND DIRECTION W (280)
HIGHEST GUST SPEED 51 HIGHEST GUST DIRECTION W (280)
AVERAGE WIND SPEED 20.6
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 86 11:00 PM
LOWEST 51 12:00 PM
AVERAGE 69
..........................................................
THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 69 93 1988
MINIMUM TEMPERATURE (F) 52 45 1950
1976
1982
SUNRISE AND SUNSET
MAY 20 2025...........SUNRISE 5:56 AM PDT SUNSET 8:17 PM PDT
MAY 21 2025...........SUNRISE 5:55 AM PDT SUNSET 8:18 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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