009  
CDUS41 KLWX 090524  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
124 AM EDT FRI APR 09 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 8 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 72 2:53 PM 87 1991 64 8 78  
MINIMUM 53 5:03 AM 24 1970 40 13 51  
AVERAGE 63 52 11 65  
 
PRECIPITATION (IN)  
YESTERDAY T 1.15 2000 0.12 -0.12 0.06  
MONTH TO DATE 0.27 0.96 -0.69 0.36  
SINCE MAR 1 2.54 4.34 -1.80 2.35  
SINCE JAN 1 8.70 9.76 -1.06 8.92  
 
SNOWFALL (IN)  
YESTERDAY 0.0 T 1972 0.1 -0.1 0.0  
2000  
MONTH TO DATE T 0.2 -0.2 0.0  
SINCE MAR 1 T 3.0 -3.0 T  
SINCE JUL 1 12.0 21.9 -9.9 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 2 13 -11 0  
MONTH TO DATE 102 116 -14 73  
SINCE MAR 1 617 763 -146 521  
SINCE JUL 1 3810 4353 -543 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 17 HIGHEST WIND DIRECTION SE (150)  
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION SE (150)  
AVERAGE WIND SPEED 8.5  
 
SKY COVER  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 62 11:00 PM  
LOWEST 30 3:00 AM  
AVERAGE 46  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 65 89 2001  
MINIMUM TEMPERATURE (F) 40 23 1977  
 
SUNRISE AND SUNSET  
APRIL 9 2021.........SUNRISE 6:42 AM EDT SUNSET 7:41 PM EDT  
APRIL 10 2021.........SUNRISE 6:40 AM EDT SUNSET 7:42 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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