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
..............................................................

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.

$$