Climatological Report (Monthly)
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
641
CXUS51 KLWX 011742
CLMIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
142 PM EDT MON SEP 01 2025
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...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2025...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1960 TO 2025
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
..............................................................
TEMPERATURE (F)
RECORD
HIGH 104 08/20/1983
LOW 38 08/29/1982
HIGHEST 95 08/17 95 0 101
LOWEST 48 08/31 50 -2 49
AVG. MAXIMUM 82.6 86.3 -3.7 87.9
AVG. MINIMUM 61.7 65.2 -3.5 65.9
MEAN 72.2 75.7 -3.5 76.9
DAYS MAX >= 90 3 9.3 -6.3 12
DAYS MAX <= 32 0 0.0 0.0 0
DAYS MIN <= 32 0 0.0 0.0 0
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 10.71 1984
MINIMUM 0.44 1998
TOTALS 0.85 3.53 -2.68 5.13
DAILY AVG. 0.03 0.11 -0.08 0.17
DAYS >= .01 8 9.3 -1.3 9
DAYS >= .10 4 5.6 -1.6 7
DAYS >= .50 0 2.2 -2.2 3
DAYS >= 1.00 0 1.1 -1.1 2
GREATEST
24 HR. TOTAL 0.41 07/31 TO 08/01 1.92
STORM TOTAL 0.27 1.92
(MM/DD(HH))
SNOWFALL (INCHES)
RECORDS
TOTAL MM MM
TOTALS 0.0 0.0 0.0 0.0
SINCE 7/1 0.0 0.0 0.0 MM
DAYS >= TRACE 0 0.0 0.0 0
DAYS >= 1.0 0 0.0 0.0 0
GREATEST
SNOW DEPTH 0 0
DEGREE DAYS
HEATING TOTAL 2 1 1 2
SINCE 7/1 2 0 2 MM
COOLING TOTAL 232 334 -102 378
SINCE 1/1 1148 1056 92 MM
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WIND (MPH)
AVERAGE WIND SPEED 5.2
HIGHEST WIND SPEED/DIRECTION 31/330
HIGHEST GUST SPEED/DIRECTION 43/330
SKY COVER
AVERAGE SKY COVER 0.57
AVERAGE RH (PERCENT) 71
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 4 MIXED PRECIP 0
HEAVY RAIN 2 RAIN 2
LIGHT RAIN 11 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 14 FOG W/VIS <= 1/4 MILE 0
HAZE 5
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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