909  
CDUS41 KLWX 250521  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
121 AM EDT SUN APR 25 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 24 2021
 
 
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)  
YESTERDAY  
MAXIMUM 64 12:57 PM 85 1990 70 -6 58  
1994  
2011  
MINIMUM 33 5:16 AM 30 1989 45 -12 46  
AVERAGE 49 57 -8 52  
 
PRECIPITATION (IN)  
YESTERDAY 0.52 1.25 1983 0.12 0.40 0.21  
MONTH TO DATE 2.03 2.77 -0.74 3.55  
SINCE MAR 1 4.30 6.15 -1.85 5.54  
SINCE JAN 1 10.46 11.57 -1.11 12.11  
 
SNOWFALL (IN)  
YESTERDAY 0.0 MM MM 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  
YESTERDAY 16 9 7 13  
MONTH TO DATE 278 290 -12 310  
SINCE MAR 1 793 937 -144 758  
SINCE JUL 1 3986 4527 -541 3902  
 
COOLING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 5 12 -7 0  
SINCE MAR 1 9 15 -6 3  
SINCE JAN 1 9 15 -6 3    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION SW (210)  
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION S (200)  
AVERAGE WIND SPEED 3.1  
 
SKY COVER  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 7:00 PM  
LOWEST 29 12:00 PM  
AVERAGE 61  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 70 93 1960  
MINIMUM TEMPERATURE (F) 45 29 1969  
 
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.  
 

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab VA Page
The Nexlab MD Page
The Nexlab WV Page Main Text Page