Climatological Report (Monthly)
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
269
CXUS51 KLWX 011829
CLMIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
229 PM EDT THU MAY 01 2025
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...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR THE MONTH OF APRIL 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 93 04/06/2010
04/17/2002
LOW 17 04/01/1969
HIGHEST 84 04/29 85 -1 91
LOWEST 26 04/09 25 1 34
AVG. MAXIMUM 68.6 66.8 1.8 69.7
AVG. MINIMUM 46.8 43.2 3.6 48.4
MEAN 57.7 55.0 2.7 59.0
DAYS MAX >= 90 0 0.4 -0.4 1
DAYS MAX <= 32 0 0.0 0.0 0
DAYS MIN <= 32 2 3.7 -1.7 0
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 7.41 2014
MINIMUM 0.33 1985
TOTALS 2.01 3.47 -1.46 1.74
DAILY AVG. 0.07 0.12 -0.05 0.06
DAYS >= .01 11 11.0 0.0 10
DAYS >= .10 5 6.3 -1.3 6
DAYS >= .50 2 2.0 0.0 1
DAYS >= 1.00 0 0.8 -0.8 0
GREATEST
24 HR. TOTAL 0.63 03/31 TO 03/31 0.89
STORM TOTAL 0.53 0.66
(MM/DD(HH))
SNOWFALL (INCHES)
RECORDS
TOTAL 4.0 1990
TOTALS 0.0 0.1 -0.1 T
SINCE 7/1 15.5 21.0 -5.5 MM
DAYS >= TRACE 0 0.1 -0.1 1
DAYS >= 1.0 0 0.0 0.0 0
GREATEST
SNOW DEPTH 0 0
DEGREE DAYS
HEATING TOTAL 241 320 -79 215
SINCE 7/1 4013 4477 -464 MM
COOLING TOTAL 30 20 10 44
SINCE 1/1 47 22 25 MM
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WIND (MPH)
AVERAGE WIND SPEED 9.1
HIGHEST WIND SPEED/DIRECTION 38/280
HIGHEST GUST SPEED/DIRECTION 55/280
SKY COVER
AVERAGE SKY COVER 0.66
AVERAGE RH (PERCENT) 63
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 4 MIXED PRECIP 0
HEAVY RAIN 1 RAIN 3
LIGHT RAIN 12 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 12 FOG W/VIS <= 1/4 MILE 0
HAZE 4
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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