Climatological Report (Daily)
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
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CDUS41 KLWX 210628
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
228 AM EDT MON SEP 21 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 20 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 82 4:46 PM 91 1965 78 4 80
MINIMUM 69 7:39 AM 40 1979 56 13 66
AVERAGE 76 67 9 73
PRECIPITATION (IN)
YESTERDAY 0.07 0.87 1966 0.14 -0.07 0.00
MONTH TO DATE 1.63 2.61 -0.98 1.05
SINCE SEP 1 1.63 2.61 -0.98 1.05
SINCE JAN 1 31.03 31.83 -0.80 25.69
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 0 14 -14 7
SINCE SEP 1 0 14 -14 7
SINCE JUL 1 0 15 -15 9
COOLING
YESTERDAY 11 4 7 8
MONTH TO DATE 187 124 63 96
SINCE SEP 1 187 124 63 96
SINCE JAN 1 1467 1180 287 1244
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION N (350)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION S (160)
AVERAGE WIND SPEED 7.5
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 87 8:00 AM
LOWEST 67 2:00 PM
AVERAGE 77
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 77 92 1965
1998
MINIMUM TEMPERATURE (F) 56 33 1962
SUNRISE AND SUNSET
SEPTEMBER 21 2026.....SUNRISE 6:57 AM EDT SUNSET 7:08 PM EDT
SEPTEMBER 22 2026.....SUNRISE 6:58 AM EDT SUNSET 7:07 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$