Climatological Report (Monthly)
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
865
CXUS51 KLWX 060401
CLMIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1201 AM EDT FRI JUN 06 2025
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...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR THE MONTH OF MAY 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
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TEMPERATURE (F)
RECORD
HIGH 97 05/29/1969
LOW 28 05/07/1970
HIGHEST 89 05/16 89 0 91
LOWEST 40 05/10 35 5 44
AVG. MAXIMUM 73.8 75.0 -1.2 77.7
AVG. MINIMUM 55.2 53.0 2.2 57.5
MEAN 64.5 64.0 0.5 67.6
DAYS MAX >= 90 0 1.4 -1.4 2
DAYS MAX <= 32 0 0.0 0.0 0
DAYS MIN <= 32 0 0.2 -0.2 0
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 10.26 2009
MINIMUM 0.34 2007
TOTALS 6.07 4.72 1.35 4.22
DAILY AVG. 0.20 0.15 0.05 0.14
DAYS >= .01 18 12.7 5.3 16
DAYS >= .10 13 8.0 5.0 10
DAYS >= .50 5 3.6 1.4 3
DAYS >= 1.00 2 0.9 1.1 0
GREATEST
24 HR. TOTAL 1.72 05/12 TO 05/13 1.21
STORM TOTAL 1.71 0.84
(MM/DD(HH))
SNOWFALL (INCHES)
RECORDS
TOTAL T 1963
TOTALS 0.0 0.0 0.0 0.0
SINCE 7/1 15.5 21.0 -5.5 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 78 115 -37 48
SINCE 7/1 4091 4593 -502 MM
COOLING TOTAL 71 84 -13 136
SINCE 1/1 118 106 12 MM
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WIND (MPH)
AVERAGE WIND SPEED 7.1
HIGHEST WIND SPEED/DIRECTION 31/300
HIGHEST GUST SPEED/DIRECTION 46/300
SKY COVER
AVERAGE SKY COVER 0.72
AVERAGE RH (PERCENT) 70
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 9 MIXED PRECIP 0
HEAVY RAIN 4 RAIN 8
LIGHT RAIN 21 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 15 FOG W/VIS <= 1/4 MILE 1
HAZE 1
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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