701
CXUS51 KLWX 011915
CLMIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
315 PM EDT MON JUN 01 2026
...............................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR THE MONTH OF MAY 2026...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1960 TO 2026
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
..........................................................
TEMPERATURE (F)
RECORD
HIGH 97 05/29/1969
LOW 28 05/07/1970
HIGHEST 96 05/19 89 7 89
LOWEST 37 05/08 35 2 40
AVG. MAXIMUM 74.9 75.0 -0.1 73.8
AVG. MINIMUM 51.7 53.0 -1.3 55.2
MEAN 63.3 64.0 -0.7 64.5
DAYS MAX >= 90 3 1.4 1.6 0
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 4.60 4.72 -0.12 6.07
DAILY AVG. 0.15 0.15 -0.00 0.20
DAYS >= .01 16 12.7 3.3 18
DAYS >= .10 7 8.0 -1.0 13
DAYS >= .50 4 3.6 0.4 5
DAYS >= 1.00 1 0.9 0.1 2
GREATEST
24 HR. TOTAL 1.64 05/23 TO 05/24 1.72
STORM TOTAL 1.11 1.71
(MM/DD(HH))
SNOWFALL (INCHES)
RECORDS
TOTAL T 1963
TOTALS 0.0 0.0 0.0 0.0
SINCE 7/1 13.6 21.0 -7.4 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 132 115 17 78
SINCE 7/1 4411 4593 -182 MM
COOLING TOTAL 87 84 3 71
SINCE 1/1 173 106 67 MM
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WIND (MPH)
AVERAGE WIND SPEED 7.1
HIGHEST WIND SPEED/DIRECTION 26/300
26/260
26/320
HIGHEST GUST SPEED/DIRECTION 40/240
40/320
SKY COVER
AVERAGE SKY COVER 0.57
AVERAGE RH (PERCENT) 66
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 4 MIXED PRECIP 0
HEAVY RAIN 5 RAIN 8
LIGHT RAIN 18 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 13 FOG W/VIS <= 1/4 MILE 0
HAZE 3
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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