231  
CDUS41 KLWX 252122  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
522 PM EDT TUE MAY 25 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 25 2021
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1960 TO 2021  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 80 3:58 PM 92 1991 77 3 77  
MINIMUM 57 4:48 AM 36 1967 56 1 61  
AVERAGE 69 66 3 69  
 
PRECIPITATION (IN)  
TODAY 0.00 1.76 1997 0.16 -0.16 0.00  
MONTH TO DATE 1.56 3.80 -2.24 2.25  
SINCE MAR 1 6.11 10.77 -4.66 9.80  
SINCE JAN 1 12.27 16.32 -4.05 16.37  
 
SNOWFALL (IN)  
TODAY 0.0 MM MM 0.0 0.0 0.0  
MONTH TO DATE 0.0 0.0 0.0 0.0  
SINCE MAR 1 T 4.0 -4.0 T  
SINCE JUL 1 12.0 21.0 -9.0 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 0 2 -2 0  
MONTH TO DATE 117 104 13 175  
SINCE MAR 1 932 1071 -139 1005  
SINCE JUL 1 4125 4581 -456 4149  
 
COOLING  
TODAY 4 4 0 4  
MONTH TO DATE 56 59 -3 32  
SINCE MAR 1 82 81 1 35  
SINCE JAN 1 82 81 1 35    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION S (180)  
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION S (180)  
AVERAGE WIND SPEED 5.8  
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 90 1:00 AM  
LOWEST 60 4:00 PM  
AVERAGE 75  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 77 92 2007  
MINIMUM TEMPERATURE (F) 56 38 1967  
 
SUNRISE AND SUNSET  
MAY 25 2021...........SUNRISE 5:50 AM EDT SUNSET 8:24 PM EDT  
MAY 26 2021...........SUNRISE 5:49 AM EDT SUNSET 8:25 PM EDT  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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