898
CDUS41 KLWX 170625
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
225 AM EDT THU SEP 17 2026
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 16 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 85 4:09 PM 97 1991 79 6 75
MINIMUM 58 3:12 AM 37 1984 58 0 59
AVERAGE 72 69 3 67
PRECIPITATION (IN)
YESTERDAY 0.00 2.05 1999 0.15 -0.15 0.69
MONTH TO DATE 1.42 2.04 -0.62 0.87
SINCE SEP 1 1.42 2.04 -0.62 0.87
SINCE JAN 1 30.82 31.26 -0.44 25.51
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 7 -7 6
SINCE SEP 1 0 7 -7 6
SINCE JUL 1 0 8 -8 8
COOLING
YESTERDAY 7 5 2 2
MONTH TO DATE 169 107 62 71
SINCE SEP 1 169 107 62 71
SINCE JAN 1 1449 1163 286 1219
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WIND (MPH)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION SW (220)
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION SW (220)
AVERAGE WIND SPEED 5.2
SKY COVER
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 3:00 AM
LOWEST 53 2:00 PM
AVERAGE 73
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 79 97 1991
MINIMUM TEMPERATURE (F) 58 35 1986
SUNRISE AND SUNSET
SEPTEMBER 17 2026.....SUNRISE 6:53 AM EDT SUNSET 7:15 PM EDT
SEPTEMBER 18 2026.....SUNRISE 6:54 AM EDT SUNSET 7:13 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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