National Weather Service Text Product
AFOS product CLIIAD
Dates interpreted at 00:00 UTCDisplaying AFOS PIL: CLIIAD
Product Timestamp: 2025-05-12 06:26 UTC
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944
CDUS41 KLWX 120626
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
226 AM EDT MON MAY 12 2025
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 11 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 80 3:54 PM 90 1993 74 6 67
MINIMUM 48 5:15 AM 29 1966 52 -4 45
AVERAGE 64 63 1 56
PRECIPITATION (IN)
YESTERDAY 0.00 3.73 2008 0.15 -0.15 0.39
MONTH TO DATE 1.43 1.59 -0.16 1.99
SINCE MAR 1 4.86 8.56 -3.70 7.62
SINCE JAN 1 9.28 14.11 -4.83 15.07
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 1 4 -3 9
MONTH TO DATE 18 57 -39 32
SINCE MAR 1 709 1024 -315 711
SINCE JUL 1 4031 4534 -503 3675
COOLING
YESTERDAY 0 2 -2 0
MONTH TO DATE 29 18 11 42
SINCE MAR 1 76 40 36 86
SINCE JAN 1 76 40 36 89
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION S (200)
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION S (200)
AVERAGE WIND SPEED 2.4
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 90 5:00 AM
LOWEST 30 12:00 PM
AVERAGE 60
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 74 90 2018
MINIMUM TEMPERATURE (F) 52 34 1969
SUNRISE AND SUNSET
MAY 12 2025...........SUNRISE 6:00 AM EDT SUNSET 8:13 PM EDT
MAY 13 2025...........SUNRISE 5:59 AM EDT SUNSET 8:14 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$