031
CDUS41 KLWX 200630
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
230 AM EDT SUN SEP 20 2026
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 19 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 79 2:07 PM 93 1977 78 1 89
1978
MINIMUM 65 7:22 AM 36 1984 57 8 56
AVERAGE 72 68 4 73
PRECIPITATION (IN)
YESTERDAY 0.00 1.26 2000 0.14 -0.14 0.00
MONTH TO DATE 1.56 2.47 -0.91 1.05
SINCE SEP 1 1.56 2.47 -0.91 1.05
SINCE JAN 1 30.96 31.69 -0.73 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 12 -12 7
SINCE SEP 1 0 12 -12 7
SINCE JUL 1 0 13 -13 9
COOLING
YESTERDAY 7 4 3 8
MONTH TO DATE 176 120 56 88
SINCE SEP 1 176 120 56 88
SINCE JAN 1 1456 1176 280 1236
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WIND (MPH)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION NE (30)
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION NE (30)
AVERAGE WIND SPEED 6.5
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 76 7:00 AM
LOWEST 60 4:00 PM
AVERAGE 68
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 78 91 1965
MINIMUM TEMPERATURE (F) 56 40 1979
SUNRISE AND SUNSET
SEPTEMBER 20 2026.....SUNRISE 6:56 AM EDT SUNSET 7:10 PM EDT
SEPTEMBER 21 2026.....SUNRISE 6:57 AM EDT SUNSET 7:08 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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