National Weather Service Text Product
AFOS product CLIIAD
Dates interpreted at 00:00 UTCDisplaying AFOS PIL: CLIIAD
Product Timestamp: 2020-12-31 05:22 UTC
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914
CDUS41 KLWX 310522
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1222 AM EST THU DEC 31 2020
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 30 2020...
CLIMATE NORMAL PERIOD: 1981 TO 2010
CLIMATE RECORD PERIOD: 1960 TO 2020
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 47 11:59 PM 67 1990 43 4 63
MINIMUM 26 12:08 AM 4 1963 25 1 45
AVERAGE 37 34 3 54
PRECIPITATION (IN)
YESTERDAY 0.00 0.87 1969 0.08 -0.08 0.18
MONTH TO DATE 5.81 2.89 2.92 2.97
SINCE DEC 1 5.81 2.89 2.92 2.97
SINCE JAN 1 49.46 41.47 7.99 40.81
SNOWFALL (IN)
YESTERDAY 0.0 0.9 1977 0.2 -0.2 0.0
MONTH TO DATE 2.4 3.4 -1.0 0.6
SINCE DEC 1 2.4 3.4 -1.0 0.6
SINCE JUL 1 2.4 3.9 -1.5 0.6
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 28 31 -3 11
MONTH TO DATE 782 851 -69 782
SINCE DEC 1 782 851 -69 782
SINCE JUL 1 1449 1767 -318 1645
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE DEC 1 0 0 0 0
SINCE JAN 1 1406 1178 228 1524
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION S (200)
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION S (180)
AVERAGE WIND SPEED 10.8
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 81 4:00 AM
LOWEST 40 3:00 PM
AVERAGE 61
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 43 73 1992
MINIMUM TEMPERATURE (F) 24 1 1993
SUNRISE AND SUNSET
DECEMBER 31 2020......SUNRISE 7:28 AM EST SUNSET 4:58 PM EST
JANUARY 1 2021.......SUNRISE 7:29 AM EST SUNSET 4:59 PM EST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$