804  
CDUS41 KLWX 152120  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
520 PM EDT THU APR 15 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 15 2021
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 64 1:28 PM 87 1967 67 -3 53  
MINIMUM 52 6:16 AM 28 1971 42 10 37  
1997  
AVERAGE 58 54 4 45  
 
PRECIPITATION (IN)  
TODAY 0.00 1.96 1983 0.11 -0.11 0.05  
MONTH TO DATE 1.51 1.77 -0.26 2.79  
SINCE MAR 1 3.78 5.15 -1.37 4.78  
SINCE JAN 1 9.94 10.57 -0.63 11.35  
 
SNOWFALL (IN)  
TODAY 0.0 T 2014 0.0 0.0 T  
2020  
MONTH TO DATE T 0.2 -0.2 T  
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  
TODAY 7 11 -4 20  
MONTH TO DATE 145 201 -56 168  
SINCE MAR 1 660 848 -188 616  
SINCE JUL 1 3853 4438 -585 3760  
 
COOLING  
TODAY 0 1 -1 0  
MONTH TO DATE 5 3 2 0  
SINCE MAR 1 9 6 3 3  
SINCE JAN 1 9 6 3 3    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 24 HIGHEST WIND DIRECTION NW (300)  
HIGHEST GUST SPEED 36 HIGHEST GUST DIRECTION W (290)  
AVERAGE WIND SPEED 11.2  
 
SKY COVER  
AVERAGE SKY COVER 0.8  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 97 12:00 AM  
LOWEST 39 4:00 PM  
AVERAGE 68  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 67 91 2002  
MINIMUM TEMPERATURE (F) 42 28 1981  
 
SUNRISE AND SUNSET  
APRIL 15 2021.........SUNRISE 6:33 AM EDT SUNSET 7:47 PM EDT  
APRIL 16 2021.........SUNRISE 6:31 AM EDT SUNSET 7:48 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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