National Weather Service Text Product
AFOS product CLIIAD
Dates interpreted at 00:00 UTCDisplaying AFOS PIL: CLIIAD
Product Timestamp: 2025-09-29 06:24 UTC
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492
CDUS41 KLWX 290624
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
224 AM EDT MON SEP 29 2025
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 28 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 85 3:01 PM 86 1998 75 10 84
2019
MINIMUM 62 11:59 PM 34 1989 53 9 71
AVERAGE 74 64 10 78
PRECIPITATION (IN)
YESTERDAY 0.00 1.61 2004 0.14 -0.14 0.01
MONTH TO DATE 1.22 3.65 -2.43 3.01
SINCE SEP 1 1.22 3.65 -2.43 3.01
SINCE JAN 1 25.86 32.87 -7.01 28.79
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 4 -4 0
MONTH TO DATE 7 35 -28 12
SINCE SEP 1 7 35 -28 12
SINCE JUL 1 9 36 -27 14
COOLING
YESTERDAY 9 2 7 13
MONTH TO DATE 159 147 12 133
SINCE SEP 1 159 147 12 133
SINCE JAN 1 1307 1203 104 1547
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION NW (330)
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION N (350)
AVERAGE WIND SPEED 2.8
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 5:00 AM
LOWEST 38 4:00 PM
AVERAGE 66
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 74 89 2019
MINIMUM TEMPERATURE (F) 52 34 1978
SUNRISE AND SUNSET
SEPTEMBER 29 2025.....SUNRISE 7:04 AM EDT SUNSET 6:55 PM EDT
SEPTEMBER 30 2025.....SUNRISE 7:05 AM EDT SUNSET 6:54 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$