National Weather Service Text Product
AFOS product CLIIAD
Dates interpreted at 00:00 UTCDisplaying AFOS PIL: CLIIAD
Product Timestamp: 2025-08-09 06:22 UTC
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738
CDUS41 KLWX 090622
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
222 AM EDT SAT AUG 09 2025
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 8 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 82 4:04 PM 101 2007 87 -5 79
MINIMUM 61 5:08 AM 49 1989 66 -5 74
AVERAGE 72 77 -5 77
PRECIPITATION (IN)
YESTERDAY 0.00 1.39 2024 0.12 -0.12 1.39
MONTH TO DATE 0.12 0.96 -0.84 1.72
SINCE JUN 1 9.99 9.41 0.58 5.07
SINCE JAN 1 23.91 26.65 -2.74 22.37
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 JUN 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 0 0 0
MONTH TO DATE 0 0 0 0
SINCE JUN 1 15 13 2 0
SINCE JUL 1 0 0 0 0
COOLING
YESTERDAY 7 12 -5 12
MONTH TO DATE 54 96 -42 147
SINCE JUN 1 852 712 140 1000
SINCE JAN 1 970 818 152 1183
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION E (90)
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION NE (50)
AVERAGE WIND SPEED 3.3
SKY COVER
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 4:00 AM
LOWEST 44 5:00 PM
AVERAGE 71
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 87 97 1980
2001
MINIMUM TEMPERATURE (F) 66 47 1989
SUNRISE AND SUNSET
AUGUST 9 2025........SUNRISE 6:18 AM EDT SUNSET 8:12 PM EDT
AUGUST 10 2025........SUNRISE 6:19 AM EDT SUNSET 8:11 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$