148
CDUS41 KLWX 130623
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
223 AM EDT SUN SEP 13 2026
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 12 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 80 4:43 PM 95 1998 81 -1 84
2019
MINIMUM 66 12:23 AM 40 1967 60 6 56
AVERAGE 73 70 3 70
PRECIPITATION (IN)
YESTERDAY T 1.18 1965 0.13 -0.13 0.00
MONTH TO DATE 1.39 1.48 -0.09 0.18
SINCE SEP 1 1.39 1.48 -0.09 0.18
SINCE JAN 1 30.79 30.70 0.09 24.82
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 0 3 -3 6
SINCE SEP 1 0 3 -3 6
SINCE JUL 1 0 4 -4 8
COOLING
YESTERDAY 8 6 2 5
MONTH TO DATE 142 86 56 50
SINCE SEP 1 142 86 56 50
SINCE JAN 1 1422 1142 280 1198
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WIND (MPH)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION SE (130)
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION SE (140)
AVERAGE WIND SPEED 5.8
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 94 11:00 PM
LOWEST 69 11:00 AM
AVERAGE 82
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 80 94 1974
MINIMUM TEMPERATURE (F) 59 43 1985
SUNRISE AND SUNSET
SEPTEMBER 13 2026.....SUNRISE 6:49 AM EDT SUNSET 7:21 PM EDT
SEPTEMBER 14 2026.....SUNRISE 6:50 AM EDT SUNSET 7:20 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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