086  
CDUS41 KLWX 200534  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
134 AM EDT TUE APR 20 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 19 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 64 4:14 PM 91 2002 68 -4 65  
MINIMUM 47 5:32 AM 27 1990 43 4 30  
2001  
AVERAGE 56 56 0 48  
 
PRECIPITATION (IN)  
YESTERDAY T 1.26 2019 0.11 -0.11 0.00  
MONTH TO DATE 1.51 2.20 -0.69 2.85  
SINCE MAR 1 3.78 5.58 -1.80 4.84  
SINCE JAN 1 9.94 11.00 -1.06 11.41  
 
SNOWFALL (IN)  
YESTERDAY 0.0 0.0 2001 0.0 0.0 0.0  
2002  
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 9 10 -1 17  
MONTH TO DATE 204 243 -39 249  
SINCE MAR 1 719 890 -171 697  
SINCE JUL 1 3912 4480 -568 3841  
 
COOLING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 5 7 -2 0  
SINCE MAR 1 9 10 -1 3  
SINCE JAN 1 9 10 -1 3    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION S (190)  
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION S (160)  
AVERAGE WIND SPEED 5.2  
 
SKY COVER  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 86 7:00 AM  
LOWEST 46 2:00 PM  
AVERAGE 66  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 68 88 1976  
1985  
MINIMUM TEMPERATURE (F) 43 28 1974  
 
SUNRISE AND SUNSET  
APRIL 20 2021.........SUNRISE 6:26 AM EDT SUNSET 7:52 PM EDT  
APRIL 21 2021.........SUNRISE 6:24 AM EDT SUNSET 7:53 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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