764  
CDUS41 KLWX 310534  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
134 AM EDT WED MAR 31 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MARCH 30 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 70 4:39 PM 89 1998 61 9 74  
MINIMUM 32 4:45 AM 22 1970 37 -5 46  
AVERAGE 51 49 2 60  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.24 1974 0.13 -0.13 0.00  
MONTH TO DATE 1.66 3.26 -1.60 1.84  
SINCE MAR 1 1.66 3.26 -1.60 1.84  
SINCE JAN 1 7.82 8.68 -0.86 8.41  
 
SNOWFALL (IN)  
YESTERDAY 0.0 5.3 1964 0.1 -0.1 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 14 16 -2 5  
MONTH TO DATE 507 632 -125 431  
SINCE MAR 1 507 632 -125 431  
SINCE JUL 1 3700 4222 -522 3575  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 4 0 4 3  
SINCE MAR 1 4 0 4 3  
SINCE JAN 1 4 0 4 3    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION S (200)  
HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION SW (210)  
AVERAGE WIND SPEED 8.5  
 
SKY COVER  
AVERAGE SKY COVER 0.3  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 88 6:00 AM  
LOWEST 28 1:00 PM  
AVERAGE 58  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 61 85 1998  
MINIMUM TEMPERATURE (F) 38 17 1964  
 
SUNRISE AND SUNSET  
MARCH 31 2021.........SUNRISE 6:56 AM EDT SUNSET 7:33 PM EDT  
APRIL 1 2021.........SUNRISE 6:54 AM EDT SUNSET 7:34 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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