002  
CDUS41 KLWX 080528  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
128 AM EDT THU APR 08 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 7 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 83 2:53 PM 91 2010 64 19 73  
MINIMUM 46 6:07 AM 21 1977 40 6 47  
AVERAGE 65 52 13 60  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.33 1988 0.12 -0.12 0.30  
MONTH TO DATE 0.27 0.84 -0.57 0.30  
SINCE MAR 1 2.54 4.22 -1.68 2.29  
SINCE JAN 1 8.70 9.64 -0.94 8.86  
 
SNOWFALL (IN)  
YESTERDAY 0.0 1.1 1990 0.0 0.0 0.0  
MONTH TO DATE T 0.1 -0.1 0.0  
SINCE MAR 1 T 2.9 -2.9 T  
SINCE JUL 1 12.0 21.8 -9.8 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 14 -14 5  
MONTH TO DATE 100 103 -3 73  
SINCE MAR 1 615 750 -135 521  
SINCE JUL 1 3808 4340 -532 3665  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE MAR 1 4 3 1 3  
SINCE JAN 1 4 3 1 3    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION NW (330)  
AVERAGE WIND SPEED 4.3  
 
SKY COVER  
AVERAGE SKY COVER 0.4  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 83 7:00 AM  
LOWEST 30 3:00 PM  
AVERAGE 57  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 64 87 1991  
MINIMUM TEMPERATURE (F) 40 24 1970  
 
SUNRISE AND SUNSET  
APRIL 8 2021.........SUNRISE 6:43 AM EDT SUNSET 7:40 PM EDT  
APRIL 9 2021.........SUNRISE 6:42 AM EDT SUNSET 7:41 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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