686
CDUS41 KLWX 300627
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
227 AM EDT WED SEP 30 2026
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 29 2026
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1960 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 74 4:22 PM 89 2019 74 0 79
MINIMUM 60 11:59 PM 34 1978 52 8 60
AVERAGE 67 63 4 70
PRECIPITATION (IN)
YESTERDAY 0.00 2.23 1963 0.14 -0.14 0.00
MONTH TO DATE 3.80 3.79 0.01 1.22
SINCE SEP 1 3.80 3.79 0.01 1.22
SINCE JAN 1 33.20 33.01 0.19 25.86
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 21 39 -18 7
SINCE SEP 1 21 39 -18 7
SINCE JUL 1 21 40 -19 9
COOLING
YESTERDAY 2 2 0 5
MONTH TO DATE 194 149 45 164
SINCE SEP 1 194 149 45 164
SINCE JAN 1 1474 1205 269 1312
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WIND (MPH)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION NW (320)
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION NW (320)
AVERAGE WIND SPEED 3.3
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 90 11:00 PM
LOWEST 64 4:00 PM
AVERAGE 77
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 74 92 1986
MINIMUM TEMPERATURE (F) 52 35 1993
SUNRISE AND SUNSET
SEPTEMBER 30 2026.....SUNRISE 7:05 AM EDT SUNSET 6:54 PM EDT
OCTOBER 1 2026.......SUNRISE 7:06 AM EDT SUNSET 6:52 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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