756
CDUS41 KLWX 110624
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
224 AM EDT THU SEP 11 2025
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 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 72 5:55 PM 99 1983 82 -10 85
MINIMUM 59 7:15 AM 43 1981 60 -1 49
AVERAGE 66 71 -5 67
PRECIPITATION (IN)
YESTERDAY 0.15 1.50 1968 0.12 0.03 0.00
MONTH TO DATE 0.18 1.22 -1.04 T
SINCE SEP 1 0.18 1.22 -1.04 T
SINCE JAN 1 24.82 30.44 -5.62 25.78
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 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
YESTERDAY 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
YESTERDAY 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
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WIND (MPH)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION N (360)
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION N (340)
AVERAGE WIND SPEED 6.9
SKY COVER
AVERAGE SKY COVER 1.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 9:00 PM
LOWEST 68 4:00 PM
AVERAGE 81
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 81 99 1983
MINIMUM TEMPERATURE (F) 60 40 1976
SUNRISE AND SUNSET
SEPTEMBER 11 2025.....SUNRISE 6:48 AM EDT SUNSET 7:24 PM EDT
SEPTEMBER 12 2025.....SUNRISE 6:49 AM EDT SUNSET 7:22 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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