National Weather Service Text Product
AFOS product CLIIAD
Dates interpreted at 00:00 UTCDisplaying AFOS PIL: CLIIAD
Product Timestamp: 2025-09-19 06:26 UTC
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139
CDUS41 KLWX 190626
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
226 AM EDT FRI SEP 19 2025
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 18 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 86 3:40 PM 91 1978 79 7 75
MINIMUM 62 6:16 AM 37 1990 57 5 67
AVERAGE 74 68 6 71
PRECIPITATION (IN)
YESTERDAY 0.00 1.76 2003 0.15 -0.15 0.53
MONTH TO DATE 1.05 2.33 -1.28 0.61
SINCE SEP 1 1.05 2.33 -1.28 0.61
SINCE JAN 1 25.69 31.55 -5.86 26.39
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 2 -2 0
MONTH TO DATE 7 10 -3 11
SINCE SEP 1 7 10 -3 11
SINCE JUL 1 9 11 -2 13
COOLING
YESTERDAY 9 4 5 6
MONTH TO DATE 80 116 -36 67
SINCE SEP 1 80 116 -36 67
SINCE JAN 1 1228 1172 56 1481
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION NW (320)
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION NW (310)
AVERAGE WIND SPEED 4.4
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 12:00 AM
LOWEST 37 3:00 PM
AVERAGE 65
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 78 93 1977
1978
MINIMUM TEMPERATURE (F) 57 36 1984
SUNRISE AND SUNSET
SEPTEMBER 19 2025.....SUNRISE 6:55 AM EDT SUNSET 7:11 PM EDT
SEPTEMBER 20 2025.....SUNRISE 6:56 AM EDT SUNSET 7:10 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$