931  
CDUS41 KLWX 082131  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
531 PM EDT SAT MAY 08 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 8 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 62 2:05 PM 90 2000 73 -11 63  
MINIMUM 39 3:15 AM 29 1974 51 -12 39  
AVERAGE 51 62 -11 51  
 
PRECIPITATION (IN)  
TODAY 0.04 2.10 1960 0.15 -0.11 0.14  
MONTH TO DATE 1.02 1.14 -0.12 1.55  
SINCE MAR 1 5.57 8.11 -2.54 9.10  
SINCE JAN 1 11.73 13.66 -1.93 15.67  
 
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 14 5 9 14  
MONTH TO DATE 44 44 0 65  
SINCE MAR 1 859 1011 -152 895  
SINCE JUL 1 4052 4521 -469 4039  
 
COOLING  
TODAY 0 2 -2 0  
MONTH TO DATE 17 12 5 4  
SINCE MAR 1 43 34 9 7  
SINCE JAN 1 43 34 9 7    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 31 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 42 HIGHEST GUST DIRECTION W (280)  
AVERAGE WIND SPEED 8.5  
 
SKY COVER  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 96 4:00 AM  
LOWEST 40 2:00 PM  
AVERAGE 68  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 74 91 1963  
MINIMUM TEMPERATURE (F) 51 30 1976  
 
SUNRISE AND SUNSET  
MAY 8 2021...........SUNRISE 6:04 AM EDT SUNSET 8:09 PM EDT  
MAY 9 2021...........SUNRISE 6:03 AM EDT SUNSET 8:10 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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