523
CDUS41 KLWX 150625
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
225 AM EDT TUE SEP 15 2026
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 14 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 2:51 PM 95 1998 80 -1 87
MINIMUM 59 11:46 PM 37 1985 59 0 59
AVERAGE 69 69 0 73
PRECIPITATION (IN)
YESTERDAY 0.00 5.52 1966 0.14 -0.14 0.00
MONTH TO DATE 1.42 1.75 -0.33 0.18
SINCE SEP 1 1.42 1.75 -0.33 0.18
SINCE JAN 1 30.82 30.97 -0.15 24.82
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 0 5 -5 6
SINCE SEP 1 0 5 -5 6
SINCE JUL 1 0 6 -6 8
COOLING
YESTERDAY 4 5 -1 8
MONTH TO DATE 162 97 65 62
SINCE SEP 1 162 97 65 62
SINCE JAN 1 1442 1153 289 1210
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WIND (MPH)
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION NW (320)
HIGHEST GUST SPEED 31 HIGHEST GUST DIRECTION NW (330)
AVERAGE WIND SPEED 9.3
SKY COVER
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 90 1:00 AM
LOWEST 37 2:00 PM
AVERAGE 64
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 80 95 1993
1998
MINIMUM TEMPERATURE (F) 58 38 1985
SUNRISE AND SUNSET
SEPTEMBER 15 2026.....SUNRISE 6:51 AM EDT SUNSET 7:18 PM EDT
SEPTEMBER 16 2026.....SUNRISE 6:52 AM EDT SUNSET 7:16 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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