National Weather Service Text Product
AFOS product CLIIAD
Dates interpreted at 00:00 UTCDisplaying AFOS PIL: CLIIAD
Product Timestamp: 2020-12-10 05:33 UTC
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873
CDUS41 KLWX 100533
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1233 AM EST THU DEC 10 2020
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 9 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 44 4:04 PM 72 1978 48 -4 52
MINIMUM 26 6:33 AM 11 1989 29 -3 36
AVERAGE 35 38 -3 44
PRECIPITATION (IN)
YESTERDAY T 1.12 1973 0.11 -0.11 0.52
MONTH TO DATE 0.99 0.98 0.01 0.98
SINCE DEC 1 0.99 0.98 0.01 0.98
SINCE JAN 1 44.64 39.56 5.08 38.82
SNOWFALL (IN)
YESTERDAY T 4.0 2017 0.1 -0.1 0.0
MONTH TO DATE T 0.8 -0.8 T
SINCE DEC 1 T 0.8 -0.8 T
SINCE JUL 1 T 1.3 -1.3 T
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 30 27 3 21
MONTH TO DATE 225 230 -5 233
SINCE DEC 1 225 230 -5 233
SINCE JUL 1 892 1146 -254 1096
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 NW (310)
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION NW (300)
AVERAGE WIND SPEED 3.2
SKY COVER
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT SNOW
RELATIVE HUMIDITY (PERCENT)
HIGHEST 88 10:00 PM
LOWEST 45 3:00 PM
AVERAGE 67
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 47 70 1966
MINIMUM TEMPERATURE (F) 28 4 1989
SUNRISE AND SUNSET
DECEMBER 10 2020......SUNRISE 7:18 AM EST SUNSET 4:48 PM EST
DECEMBER 11 2020......SUNRISE 7:19 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.
$$