757  
CDUS41 KLWX 112123  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
523 PM EDT SUN APR 11 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 11 2021
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD: 1981 TO 2010  
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 2:57 PM 87 1977 65 14 63  
MINIMUM 60 12:18 AM 25 1960 41 19 34  
1970  
1971  
AVERAGE 70 53 17 49  
 
PRECIPITATION (IN)  
TODAY 0.12 0.74 2009 0.12 0.00 0.00  
MONTH TO DATE 1.02 1.33 -0.31 0.48  
SINCE MAR 1 3.29 4.71 -1.42 2.47  
SINCE JAN 1 9.45 10.13 -0.68 9.04  
 
SNOWFALL (IN)  
TODAY MM T 1973 0.0 MM 0.0  
1986  
MONTH TO DATE T 0.2 -0.2 0.0  
SINCE MAR 1 T 3.0 -3.0 T  
SINCE JUL 1 12.0 21.9 -9.9 2.9  
SNOW DEPTH MM  
 
DEGREE DAYS  
HEATING  
TODAY 0 12 -12 16  
MONTH TO DATE 114 154 -40 119  
SINCE MAR 1 629 801 -172 567  
SINCE JUL 1 3822 4391 -569 3711  
 
COOLING  
TODAY 5 0 5 0  
MONTH TO DATE 5 0 5 0  
SINCE MAR 1 9 3 6 3  
SINCE JAN 1 9 3 6 3    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION SW (210)  
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION S (200)  
AVERAGE WIND SPEED 8.9  
 
SKY COVER  
AVERAGE SKY COVER 0.7  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 97 3:00 AM  
LOWEST 29 2:00 PM  
AVERAGE 63  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 66 87 1977  
MINIMUM TEMPERATURE (F) 41 23 1982  
 
SUNRISE AND SUNSET  
APRIL 11 2021.........SUNRISE 6:39 AM EDT SUNSET 7:43 PM EDT  
APRIL 12 2021.........SUNRISE 6:37 AM EDT SUNSET 7:44 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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