323
CDUS41 KLWX 140626
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
226 AM EDT SUN SEP 14 2025
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 13 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 87 2:31 PM 94 1974 80 7 81
MINIMUM 51 5:55 AM 43 1985 59 -8 57
AVERAGE 69 70 -1 69
PRECIPITATION (IN)
YESTERDAY 0.00 0.68 1983 0.13 -0.13 0.00
MONTH TO DATE 0.18 1.61 -1.43 T
SINCE SEP 1 0.18 1.61 -1.43 T
SINCE JAN 1 24.82 30.83 -6.01 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 4 2 11
SINCE SEP 1 6 4 2 11
SINCE JUL 1 8 5 3 13
COOLING
YESTERDAY 4 6 -2 4
MONTH TO DATE 54 92 -38 38
SINCE SEP 1 54 92 -38 38
SINCE JAN 1 1202 1148 54 1452
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WIND (MPH)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION SE (140)
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION W (260)
AVERAGE WIND SPEED 5.1
SKY COVER
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 6:00 AM
LOWEST 29 3:00 PM
AVERAGE 65
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 80 95 1998
MINIMUM TEMPERATURE (F) 59 37 1985
SUNRISE AND SUNSET
SEPTEMBER 14 2025.....SUNRISE 6:51 AM EDT SUNSET 7:19 PM EDT
SEPTEMBER 15 2025.....SUNRISE 6:51 AM EDT SUNSET 7:18 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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