229
CDUS41 KLWX 130621
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
221 AM EDT SAT SEP 13 2025
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 12 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 84 2:39 PM 95 1998 81 3 82
2019
MINIMUM 56 1:58 AM 40 1967 60 -4 57
AVERAGE 70 70 0 70
PRECIPITATION (IN)
YESTERDAY 0.00 1.18 1965 0.13 -0.13 0.00
MONTH TO DATE 0.18 1.48 -1.30 T
SINCE SEP 1 0.18 1.48 -1.30 T
SINCE JAN 1 24.82 30.70 -5.88 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 3 3 11
SINCE SEP 1 6 3 3 11
SINCE JUL 1 8 4 4 13
COOLING
YESTERDAY 5 6 -1 5
MONTH TO DATE 50 86 -36 34
SINCE SEP 1 50 86 -36 34
SINCE JAN 1 1198 1142 56 1448
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WIND (MPH)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION E (70)
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION E (90)
AVERAGE WIND SPEED 4.3
SKY COVER
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 12:00 AM
LOWEST 30 5:00 PM
AVERAGE 65
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 80 94 1974
MINIMUM TEMPERATURE (F) 59 43 1985
SUNRISE AND SUNSET
SEPTEMBER 13 2025.....SUNRISE 6:50 AM EDT SUNSET 7:21 PM EDT
SEPTEMBER 14 2025.....SUNRISE 6:51 AM EDT SUNSET 7:19 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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