725  
CDUS41 KLWX 170532  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
132 AM EDT SAT APR 17 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 16 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 59 2:10 PM 91 2002 67 -8 52  
MINIMUM 35 3:04 AM 28 1981 42 -7 33  
AVERAGE 47 55 -8 43  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 2.43 1993 0.11 -0.11 0.00  
MONTH TO DATE 1.51 1.88 -0.37 2.79  
SINCE MAR 1 3.78 5.26 -1.48 4.78  
SINCE JAN 1 9.94 10.68 -0.74 11.35  
 
SNOWFALL (IN)  
YESTERDAY 0.0 T 1988 0.1 -0.1 0.0  
MONTH TO DATE T 0.3 -0.3 T  
SINCE MAR 1 T 3.1 -3.1 T  
SINCE JUL 1 12.0 22.0 -10.0 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 18 11 7 22  
MONTH TO DATE 167 212 -45 190  
SINCE MAR 1 682 859 -177 638  
SINCE JUL 1 3875 4449 -574 3782  
 
COOLING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 5 4 1 0  
SINCE MAR 1 9 7 2 3  
SINCE JAN 1 9 7 2 3    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 28 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 35 HIGHEST GUST DIRECTION W (290)  
AVERAGE WIND SPEED 11.4  
 
SKY COVER  
AVERAGE SKY COVER 0.4  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 82 3:00 AM  
LOWEST 40 5:00 PM  
AVERAGE 61  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 67 93 2002  
MINIMUM TEMPERATURE (F) 43 27 1983  
 
SUNRISE AND SUNSET  
APRIL 17 2021.........SUNRISE 6:30 AM EDT SUNSET 7:49 PM EDT  
APRIL 18 2021.........SUNRISE 6:29 AM EDT SUNSET 7:50 PM EDT  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab VA Page
The Nexlab MD Page
The Nexlab WV Page Main Text Page