400  
CDUS41 KLWX 252123  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
523 PM EDT SUN APR 25 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 25 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 66 2:57 PM 93 1960 70 -4 62  
MINIMUM 49 5:46 AM 29 1969 45 4 39  
AVERAGE 58 57 1 51  
 
PRECIPITATION (IN)  
TODAY 0.19 1.34 1973 0.11 0.08 0.09  
MONTH TO DATE 2.22 2.88 -0.66 3.64  
SINCE MAR 1 4.49 6.26 -1.77 5.63  
SINCE JAN 1 10.65 11.68 -1.03 12.20  
 
SNOWFALL (IN)  
TODAY 0.0 T 2015 0.0 0.0 0.0  
MONTH TO DATE T 0.3 -0.3 T  
SINCE MAR 1 T 3.1 -3.1 T  
SINCE JUL 1 12.0 22.0 -10.0 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 7 9 -2 14  
MONTH TO DATE 285 299 -14 324  
SINCE MAR 1 800 946 -146 772  
SINCE JUL 1 3993 4536 -543 3916  
 
COOLING  
TODAY 0 1 -1 0  
MONTH TO DATE 5 13 -8 0  
SINCE MAR 1 9 16 -7 3  
SINCE JAN 1 9 16 -7 3    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 23 HIGHEST WIND DIRECTION NW (300)  
HIGHEST GUST SPEED 35 HIGHEST GUST DIRECTION W (280)  
AVERAGE WIND SPEED 11.8  
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 97 4:00 AM  
LOWEST 45 3:00 PM  
AVERAGE 71  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 70 92 1990  
2009  
MINIMUM TEMPERATURE (F) 45 31 1967  
 
SUNRISE AND SUNSET  
APRIL 25 2021.........SUNRISE 6:19 AM EDT SUNSET 7:57 PM EDT  
APRIL 26 2021.........SUNRISE 6:18 AM EDT SUNSET 7:58 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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