357
CDUS41 KLWX 080621
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
221 AM EDT MON SEP 08 2025
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 7 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 78 4:18 PM 97 2023 82 -4 76
MINIMUM 51 11:48 PM 41 1976 61 -10 57
AVERAGE 65 72 -7 67
PRECIPITATION (IN)
YESTERDAY 0.01 1.11 2011 0.12 -0.11 T
MONTH TO DATE 0.03 0.85 -0.82 T
SINCE SEP 1 0.03 0.85 -0.82 T
SINCE JAN 1 24.67 30.07 -5.40 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 0 0 0
MONTH TO DATE 0 0 0 2
SINCE SEP 1 0 0 0 2
SINCE JUL 1 2 1 1 4
COOLING
YESTERDAY 0 7 -7 2
MONTH TO DATE 38 54 -16 21
SINCE SEP 1 38 54 -16 21
SINCE JAN 1 1186 1110 76 1435
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WIND (MPH)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION NW (320)
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION NW (330)
AVERAGE WIND SPEED 8.1
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 87 12:00 AM
LOWEST 29 4:00 PM
AVERAGE 58
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 82 96 2016
MINIMUM TEMPERATURE (F) 61 43 1984
SUNRISE AND SUNSET
SEPTEMBER 8 2025.....SUNRISE 6:45 AM EDT SUNSET 7:29 PM EDT
SEPTEMBER 9 2025.....SUNRISE 6:46 AM EDT SUNSET 7:27 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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