National Weather Service Text Product
AFOS product CLIIAD
Dates interpreted at 00:00 UTCDisplaying AFOS PIL: CLIIAD
Product Timestamp: 2020-12-12 05:24 UTC
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499
CDUS41 KLWX 120524
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1224 AM EST SAT DEC 12 2020
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 11 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 62 3:46 PM 71 1979 47 15 41
MINIMUM 32 6:16 AM 3 1968 28 4 30
AVERAGE 47 38 9 36
PRECIPITATION (IN)
YESTERDAY 0.00 1.34 2008 0.10 -0.10 0.05
MONTH TO DATE 0.99 1.19 -0.20 1.24
SINCE DEC 1 0.99 1.19 -0.20 1.24
SINCE JAN 1 44.64 39.77 4.87 39.08
SNOWFALL (IN)
YESTERDAY 0.0 0.5 1962 0.1 -0.1 0.2
MONTH TO DATE T 1.0 -1.0 0.2
SINCE DEC 1 T 1.0 -1.0 0.2
SINCE JUL 1 T 1.5 -1.5 0.2
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 18 27 -9 29
MONTH TO DATE 269 284 -15 280
SINCE DEC 1 269 284 -15 280
SINCE JUL 1 936 1200 -264 1143
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 13 HIGHEST WIND DIRECTION S (190)
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION S (200)
AVERAGE WIND SPEED 6.3
SKY COVER
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 92 6:00 AM
LOWEST 44 3:00 PM
AVERAGE 68
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 47 72 1979
MINIMUM TEMPERATURE (F) 28 9 1988
SUNRISE AND SUNSET
DECEMBER 12 2020......SUNRISE 7:20 AM EST SUNSET 4:48 PM EST
DECEMBER 13 2020......SUNRISE 7:20 AM EST SUNSET 4:48 PM EST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$