National Weather Service Text Product
AFOS product CLIIAD
Dates interpreted at 00:00 UTCDisplaying AFOS PIL: CLIIAD
Product Timestamp: 2025-05-11 06:30 UTC
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743
CDUS41 KLWX 110630
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
230 AM EDT SUN MAY 11 2025
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 10 2025...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1960 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 74 4:47 PM 90 1963 74 0 64
MINIMUM 40 5:32 AM 31 1966 51 -11 50
1983
AVERAGE 57 62 -5 57
PRECIPITATION (IN)
YESTERDAY 0.00 1.61 1990 0.15 -0.15 0.08
MONTH TO DATE 1.43 1.44 -0.01 1.60
SINCE MAR 1 4.86 8.41 -3.55 7.23
SINCE JAN 1 9.28 13.96 -4.68 14.68
SNOWFALL (IN)
YESTERDAY 0.0 MM MM 0.0 0.0 0.0
MONTH TO DATE 0.0 0.0 0.0 0.0
SINCE MAR 1 0.0 4.0 -4.0 T
SINCE JUL 1 15.5 21.0 -5.5 11.7
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 8 4 4 8
MONTH TO DATE 17 53 -36 23
SINCE MAR 1 708 1020 -312 702
SINCE JUL 1 4030 4530 -500 3666
COOLING
YESTERDAY 0 2 -2 0
MONTH TO DATE 29 16 13 42
SINCE MAR 1 76 38 38 86
SINCE JAN 1 76 38 38 89
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION NW (300)
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION NW (310)
AVERAGE WIND SPEED 7.6
SKY COVER
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 63 5:00 AM
LOWEST 26 5:00 PM
AVERAGE 45
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 74 90 1993
MINIMUM TEMPERATURE (F) 52 29 1966
SUNRISE AND SUNSET
MAY 11 2025...........SUNRISE 6:01 AM EDT SUNSET 8:12 PM EDT
MAY 12 2025...........SUNRISE 6:00 AM EDT SUNSET 8:13 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$