589  
CDUS41 KLWX 052121  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
521 PM EDT WED MAY 05 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 5 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 79 12:33 PM 88 1980 73 6 58  
MINIMUM 61 2:40 AM 29 1976 50 11 47  
AVERAGE 70 61 9 53  
 
PRECIPITATION (IN)  
TODAY 0.22 2.34 1989 0.14 0.08 0.26  
MONTH TO DATE 0.79 0.71 0.08 1.14  
SINCE MAR 1 5.34 7.68 -2.34 8.69  
SINCE JAN 1 11.50 13.23 -1.73 15.26  
 
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 5 -5 12  
MONTH TO DATE 7 29 -22 27  
SINCE MAR 1 822 996 -174 857  
SINCE JUL 1 4015 4506 -491 4001  
 
COOLING  
TODAY 5 2 3 0  
MONTH TO DATE 20 6 14 4  
SINCE MAR 1 46 28 18 7  
SINCE JAN 1 46 28 18 7    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 26 HIGHEST WIND DIRECTION NW (310)  
HIGHEST GUST SPEED 38 HIGHEST GUST DIRECTION NW (310)  
AVERAGE WIND SPEED 6.0  
 
SKY COVER  
AVERAGE SKY COVER 0.8  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
RAIN  
LIGHT RAIN  
FOG  
FOG W/VISIBILITY <= 1/4 MILE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 1:00 AM  
LOWEST 51 4:00 PM  
AVERAGE 76  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 73 90 1986  
MINIMUM TEMPERATURE (F) 50 36 1968  
 
SUNRISE AND SUNSET  
MAY 5 2021...........SUNRISE 6:07 AM EDT SUNSET 8:07 PM EDT  
MAY 6 2021...........SUNRISE 6:06 AM EDT SUNSET 8:08 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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