373
CDUS41 KLWX 180623
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
223 AM EDT THU SEP 18 2025
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 17 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 68 4:41 PM 97 1991 79 -11 79
MINIMUM 59 4:21 AM 35 1986 58 1 66
AVERAGE 64 68 -4 73
PRECIPITATION (IN)
YESTERDAY 0.18 1.71 2004 0.14 0.04 0.08
MONTH TO DATE 1.05 2.18 -1.13 0.08
SINCE SEP 1 1.05 2.18 -1.13 0.08
SINCE JAN 1 25.69 31.40 -5.71 25.86
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 1 1 0 0
MONTH TO DATE 7 8 -1 11
SINCE SEP 1 7 8 -1 11
SINCE JUL 1 9 9 0 13
COOLING
YESTERDAY 0 5 -5 8
MONTH TO DATE 71 112 -41 61
SINCE SEP 1 71 112 -41 61
SINCE JAN 1 1219 1168 51 1475
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WIND (MPH)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION N (350)
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION N (350)
AVERAGE WIND SPEED 10.2
SKY COVER
AVERAGE SKY COVER 1.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 3:00 PM
LOWEST 83 1:00 AM
AVERAGE 90
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 79 91 1978
MINIMUM TEMPERATURE (F) 57 37 1990
SUNRISE AND SUNSET
SEPTEMBER 18 2025.....SUNRISE 6:54 AM EDT SUNSET 7:13 PM EDT
SEPTEMBER 19 2025.....SUNRISE 6:55 AM EDT SUNSET 7:11 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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