135  
CDUS41 KLWX 050530  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
130 AM EDT MON APR 05 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 4 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 73 4:26 PM 85 2011 63 10 62  
MINIMUM 34 2:21 AM 22 1965 39 -5 43  
2013  
AVERAGE 54 51 3 53  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.47 1987 0.12 -0.12 0.00  
MONTH TO DATE 0.27 0.49 -0.22 T  
SINCE MAR 1 2.54 3.87 -1.33 1.99  
SINCE JAN 1 8.70 9.29 -0.59 8.56  
 
SNOWFALL (IN)  
YESTERDAY 0.0 0.2 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 11 15 -4 12  
MONTH TO DATE 88 61 27 53  
SINCE MAR 1 603 708 -105 501  
SINCE JUL 1 3796 4298 -502 3645  
 
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 22 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 31 HIGHEST GUST DIRECTION NW (310)  
AVERAGE WIND SPEED 8.8  
 
SKY COVER  
AVERAGE SKY COVER 0.3  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 69 2:00 AM  
LOWEST 19 5:00 PM  
AVERAGE 44  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 63 86 2010  
MINIMUM TEMPERATURE (F) 39 22 1965  
 
SUNRISE AND SUNSET  
APRIL 5 2021.........SUNRISE 6:48 AM EDT SUNSET 7:38 PM EDT  
APRIL 6 2021.........SUNRISE 6:46 AM EDT SUNSET 7:39 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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