840
CDUS41 KLWX 102124
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
524 PM EDT WED SEP 10 2025
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 10 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 72 3:59 PM 99 1983 82 -10 85
MINIMUM 59 7:15 AM 43 1981 60 -1 49
AVERAGE 66 71 -5 67
PRECIPITATION (IN)
TODAY 0.02 1.50 1968 0.12 -0.10 0.00
MONTH TO DATE 0.05 1.22 -1.17 T
SINCE SEP 1 0.05 1.22 -1.17 T
SINCE JAN 1 24.69 30.44 -5.75 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 0 1 -1 0
MONTH TO DATE 6 1 5 11
SINCE SEP 1 6 1 5 11
SINCE JUL 1 8 2 6 13
COOLING
TODAY 1 6 -5 2
MONTH TO DATE 39 74 -35 23
SINCE SEP 1 39 74 -35 23
SINCE JAN 1 1187 1130 57 1437
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION N (360)
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION N (340)
AVERAGE WIND SPEED 8.4
SKY COVER
AVERAGE SKY COVER 1.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT RAIN
FOG
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 11:00 AM
LOWEST 68 4:00 PM
AVERAGE 81
......................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 81 99 1983
MINIMUM TEMPERATURE (F) 60 40 1976
SUNRISE AND SUNSET
SEPTEMBER 10 2025.....SUNRISE 6:47 AM EDT SUNSET 7:26 PM EDT
SEPTEMBER 11 2025.....SUNRISE 6:48 AM EDT SUNSET 7:24 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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