342
CDUS41 KLWX 092125
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
525 PM EDT TUE SEP 09 2025
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 9 2025
VALID TODAY AS OF 0500 PM LOCAL TIME.
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)
TODAY
MAXIMUM 78 2:27 PM 98 2016 82 -4 78
MINIMUM 46 5:07 AM 40 1986 61 -15 43
AVERAGE 62 71 -9 61
PRECIPITATION (IN)
TODAY 0.00 1.40 2018 0.13 -0.13 0.00
MONTH TO DATE 0.03 1.10 -1.07 T
SINCE SEP 1 0.03 1.10 -1.07 T
SINCE JAN 1 24.67 30.32 -5.65 25.78
SNOWFALL (IN)
TODAY 0.0 MM MM 0.0 0.0 0.0
MONTH TO DATE 0.0 0.0 0.0 0.0
SINCE SEP 1 0.0 0.0 0.0 0.0
SINCE JUL 1 0.0 0.0 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
TODAY 3 0 3 4
MONTH TO DATE 6 0 6 11
SINCE SEP 1 6 0 6 11
SINCE JUL 1 8 1 7 13
COOLING
TODAY 0 7 -7 0
MONTH TO DATE 38 68 -30 21
SINCE SEP 1 38 68 -30 21
SINCE JAN 1 1186 1124 62 1435
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION E (70)
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION NE (40)
AVERAGE WIND SPEED 5.8
SKY COVER
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 5:00 AM
LOWEST 33 2:00 PM
AVERAGE 63
......................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 82 99 1983
MINIMUM TEMPERATURE (F) 60 43 1981
SUNRISE AND SUNSET
SEPTEMBER 9 2025.....SUNRISE 6:46 AM EDT SUNSET 7:27 PM EDT
SEPTEMBER 10 2025.....SUNRISE 6:47 AM EDT SUNSET 7:26 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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