990  
CDUS41 KLWX 260522  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
122 AM EDT MON APR 26 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 25 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 66 2:57 PM 93 1960 70 -4 62  
MINIMUM 49 5:46 AM 29 1969 45 4 39  
AVERAGE 58 57 1 51  
 
PRECIPITATION (IN)  
YESTERDAY 0.19 1.34 1973 0.11 0.08 0.09  
MONTH TO DATE 2.22 2.88 -0.66 3.64  
SINCE MAR 1 4.49 6.26 -1.77 5.63  
SINCE JAN 1 10.65 11.68 -1.03 12.20  
 
SNOWFALL (IN)  
YESTERDAY 0.0 T 2015 0.0 0.0 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 7 9 -2 14  
MONTH TO DATE 285 299 -14 324  
SINCE MAR 1 800 946 -146 772  
SINCE JUL 1 3993 4536 -543 3916  
 
COOLING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 5 13 -8 0  
SINCE MAR 1 9 16 -7 3  
SINCE JAN 1 9 16 -7 3    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 23 HIGHEST WIND DIRECTION NW (300)  
HIGHEST GUST SPEED 35 HIGHEST GUST DIRECTION W (280)  
AVERAGE WIND SPEED 11.2  
 
SKY COVER  
AVERAGE SKY COVER 0.8  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 97 4:00 AM  
LOWEST 45 3:00 PM  
AVERAGE 71  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 70 92 1990  
2009  
MINIMUM TEMPERATURE (F) 45 31 1967  
 
SUNRISE AND SUNSET  
APRIL 26 2021.........SUNRISE 6:18 AM EDT SUNSET 7:58 PM EDT  
APRIL 27 2021.........SUNRISE 6:16 AM EDT SUNSET 7:59 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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