367
CDUS41 KLWX 192122
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
522 PM EDT FRI SEP 19 2025
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 19 2025
VALID TODAY AS OF 0500 PM LOCAL TIME.
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)
TODAY
MAXIMUM 89 3:53 PM 93 1977 78 11 82
1978
MINIMUM 56 6:16 AM 36 1984 57 -1 66
AVERAGE 73 68 5 74
PRECIPITATION (IN)
TODAY 0.00 1.26 2000 0.14 -0.14 0.00
MONTH TO DATE 1.05 2.47 -1.42 0.61
SINCE SEP 1 1.05 2.47 -1.42 0.61
SINCE JAN 1 25.69 31.69 -6.00 26.39
SNOWFALL (IN)
TODAY 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
TODAY 0 2 -2 0
MONTH TO DATE 7 12 -5 11
SINCE SEP 1 7 12 -5 11
SINCE JUL 1 9 13 -4 13
COOLING
TODAY 8 4 4 9
MONTH TO DATE 88 120 -32 76
SINCE SEP 1 88 120 -32 76
SINCE JAN 1 1236 1176 60 1490
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION NW (300)
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION NW (320)
AVERAGE WIND SPEED 3.3
SKY COVER
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 1:00 AM
LOWEST 33 2:00 PM
AVERAGE 67
......................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 78 91 1965
MINIMUM TEMPERATURE (F) 56 40 1979
SUNRISE AND SUNSET
SEPTEMBER 19 2025.....SUNRISE 6:55 AM EDT SUNSET 7:11 PM EDT
SEPTEMBER 20 2025.....SUNRISE 6:56 AM EDT SUNSET 7:10 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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