104  
CDUS41 KLWX 060529  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
129 AM EDT TUE APR 06 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 5 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 74 5:30 PM 86 2010 63 11 71  
MINIMUM 38 6:03 AM 22 1965 39 -1 42  
AVERAGE 56 51 5 57  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.75 1960 0.11 -0.11 T  
MONTH TO DATE 0.27 0.60 -0.33 T  
SINCE MAR 1 2.54 3.98 -1.44 1.99  
SINCE JAN 1 8.70 9.40 -0.70 8.56  
 
SNOWFALL (IN)  
YESTERDAY 0.0 T 1987 0.0 0.0 0.0  
2007  
2016  
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 9 14 -5 8  
MONTH TO DATE 97 75 22 61  
SINCE MAR 1 612 722 -110 509  
SINCE JUL 1 3805 4312 -507 3653  
 
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 17 HIGHEST WIND DIRECTION NW (310)  
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION NW (330)  
AVERAGE WIND SPEED 5.8  
 
SKY COVER  
AVERAGE SKY COVER 0.3  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 76 5:00 AM  
LOWEST 23 2:00 PM  
AVERAGE 50  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 64 93 2010  
MINIMUM TEMPERATURE (F) 39 24 1966  
2016  
 
SUNRISE AND SUNSET  
APRIL 6 2021.........SUNRISE 6:46 AM EDT SUNSET 7:39 PM EDT  
APRIL 7 2021.........SUNRISE 6:45 AM EDT SUNSET 7:40 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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