243
CDUS41 KLWX 150625
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
225 AM EDT MON SEP 15 2025
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 14 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 87 2:39 PM 95 1998 80 7 85
MINIMUM 59 6:33 AM 37 1985 59 0 58
AVERAGE 73 69 4 72
PRECIPITATION (IN)
YESTERDAY 0.00 5.52 1966 0.14 -0.14 0.00
MONTH TO DATE 0.18 1.75 -1.57 T
SINCE SEP 1 0.18 1.75 -1.57 T
SINCE JAN 1 24.82 30.97 -6.15 25.78
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 6 5 1 11
SINCE SEP 1 6 5 1 11
SINCE JUL 1 8 6 2 13
COOLING
YESTERDAY 8 5 3 7
MONTH TO DATE 62 97 -35 45
SINCE SEP 1 62 97 -35 45
SINCE JAN 1 1210 1153 57 1459
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION N (20)
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION N (20)
AVERAGE WIND SPEED 3.5
SKY COVER
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 87 6:00 AM
LOWEST 34 2:00 PM
AVERAGE 61
......................................................
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 2025.....SUNRISE 6:51 AM EDT SUNSET 7:18 PM EDT
SEPTEMBER 16 2025.....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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