561  
CDUS41 KLWX 132125  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
525 PM EDT THU MAY 13 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 13 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 70 3:56 PM 92 2000 74 -4 70  
MINIMUM 41 5:13 AM 32 1976 52 -11 34  
AVERAGE 56 63 -7 52  
 
PRECIPITATION (IN)  
TODAY 0.00 1.93 1971 0.15 -0.15 0.00  
MONTH TO DATE 1.02 1.90 -0.88 1.55  
SINCE MAR 1 5.57 8.87 -3.30 9.10  
SINCE JAN 1 11.73 14.42 -2.69 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 9 4 5 13  
MONTH TO DATE 89 65 24 146  
SINCE MAR 1 904 1032 -128 976  
SINCE JUL 1 4097 4542 -445 4120  
 
COOLING  
TODAY 0 2 -2 0  
MONTH TO DATE 17 22 -5 4  
SINCE MAR 1 43 44 -1 7  
SINCE JAN 1 43 44 -1 7    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION NE (30)  
AVERAGE WIND SPEED 6.1  
 
SKY COVER  
AVERAGE SKY COVER 0.3  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 76 4:00 AM  
LOWEST 24 12:00 PM  
AVERAGE 50  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 75 89 2010  
MINIMUM TEMPERATURE (F) 52 32 1996  
2013  
 
SUNRISE AND SUNSET  
MAY 13 2021...........SUNRISE 5:59 AM EDT SUNSET 8:14 PM EDT  
MAY 14 2021...........SUNRISE 5:58 AM EDT SUNSET 8:15 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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