915  
CDUS41 KLWX 010538  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
138 AM EDT THU APR 01 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MARCH 31 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 65 8:57 AM 85 1998 61 4 54  
MINIMUM 48 11:59 PM 17 1964 38 10 42  
AVERAGE 57 49 8 48  
 
PRECIPITATION (IN)  
YESTERDAY 0.61 1.55 2017 0.12 0.49 0.15  
MONTH TO DATE 2.27 3.38 -1.11 1.99  
SINCE MAR 1 2.27 3.38 -1.11 1.99  
SINCE JAN 1 8.43 8.80 -0.37 8.56  
 
SNOWFALL (IN)  
YESTERDAY 0.0 1.7 1964 0.0 0.0 0.0  
MONTH TO DATE T 2.8 -2.8 T  
SINCE MAR 1 T 2.8 -2.8 T  
SINCE JUL 1 12.0 21.7 -9.7 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 8 16 -8 17  
MONTH TO DATE 515 648 -133 448  
SINCE MAR 1 515 648 -133 448  
SINCE JUL 1 3708 4238 -530 3592  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 4 3 1 3  
SINCE MAR 1 4 3 1 3  
SINCE JAN 1 4 3 1 3    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 28 HIGHEST WIND DIRECTION NW (330)  
HIGHEST GUST SPEED 39 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 7.2  
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 8:00 PM  
LOWEST 67 12:00 AM  
AVERAGE 84  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 62 85 1978  
MINIMUM TEMPERATURE (F) 38 17 1969  
 
SUNRISE AND SUNSET  
APRIL 1 2021.........SUNRISE 6:54 AM EDT SUNSET 7:34 PM EDT  
APRIL 2 2021.........SUNRISE 6:52 AM EDT SUNSET 7:35 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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