117
CDUS41 KLWX 010628
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
228 AM EDT TUE SEP 01 2026
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 31 2026
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1960 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 86 1:04 PM 98 1991 84 2 79
MINIMUM 69 4:41 AM 43 1976 63 6 48
AVERAGE 78 74 4 64
PRECIPITATION (IN)
YESTERDAY T 3.21 1975 0.11 -0.11 0.00
MONTH TO DATE 4.85 3.53 1.32 0.85
SINCE JUN 1 14.48 11.98 2.50 10.72
SINCE JAN 1 29.40 29.22 0.18 24.64
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 JUN 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 1
MONTH TO DATE 0 0 0 2
SINCE JUN 1 1 13 -12 17
SINCE JUL 1 0 0 0 2
COOLING
YESTERDAY 13 9 4 0
MONTH TO DATE 394 334 60 232
SINCE JUN 1 1107 950 157 1030
SINCE JAN 1 1280 1056 224 1148
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WIND (MPH)
HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION N (10)
HIGHEST GUST SPEED 13 HIGHEST GUST DIRECTION N (360)
AVERAGE WIND SPEED 2.7
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 1:00 AM
LOWEST 61 5:00 PM
AVERAGE 81
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 84 98 1962
1980
MINIMUM TEMPERATURE (F) 63 49 1970
1976
SUNRISE AND SUNSET
SEPTEMBER 1 2026.....SUNRISE 6:39 AM EDT SUNSET 7:40 PM EDT
SEPTEMBER 2 2026.....SUNRISE 6:40 AM EDT SUNSET 7:39 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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