Climatological Report (Daily)
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
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CDUS41 KLWX 230624
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
224 AM EDT TUE SEP 23 2025
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 22 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 79 4:22 PM 94 1970 77 2 74
1980
2010
MINIMUM 64 7:16 AM 35 1962 56 8 64
AVERAGE 72 66 6 69
PRECIPITATION (IN)
YESTERDAY 0.00 1.57 1982 0.12 -0.12 0.02
MONTH TO DATE 1.05 2.86 -1.81 0.64
SINCE SEP 1 1.05 2.86 -1.81 0.64
SINCE JAN 1 25.69 32.08 -6.39 26.42
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 2 -2 0
MONTH TO DATE 7 18 -11 11
SINCE SEP 1 7 18 -11 11
SINCE JUL 1 9 19 -10 13
COOLING
YESTERDAY 7 3 4 4
MONTH TO DATE 108 131 -23 97
SINCE SEP 1 108 131 -23 97
SINCE JAN 1 1256 1187 69 1511
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION S (190)
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION S (190)
AVERAGE WIND SPEED 6.9
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 84 11:00 PM
LOWEST 58 4:00 PM
AVERAGE 71
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 77 94 2019
MINIMUM TEMPERATURE (F) 55 33 1983
SUNRISE AND SUNSET
SEPTEMBER 23 2025.....SUNRISE 6:59 AM EDT SUNSET 7:05 PM EDT
SEPTEMBER 24 2025.....SUNRISE 7:00 AM EDT SUNSET 7:03 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$