736  
CDUS41 KLWX 270526  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
126 AM EDT TUE APR 27 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 26 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 69 6:01 PM 92 1990 70 -1 56  
2009  
MINIMUM 41 4:56 AM 31 1967 45 -4 47  
AVERAGE 55 58 -3 52  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.93 2004 0.12 -0.12 0.38  
MONTH TO DATE 2.22 3.00 -0.78 4.02  
SINCE MAR 1 4.49 6.38 -1.89 6.01  
SINCE JAN 1 10.65 11.80 -1.15 12.58  
 
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 10 8 2 13  
MONTH TO DATE 295 307 -12 337  
SINCE MAR 1 810 954 -144 785  
SINCE JUL 1 4003 4544 -541 3929  
 
COOLING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 5 14 -9 0  
SINCE MAR 1 9 17 -8 3  
SINCE JAN 1 9 17 -8 3    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 9.0  
 
SKY COVER  
AVERAGE SKY COVER 0.2  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 76 11:00 PM  
LOWEST 22 3:00 PM  
AVERAGE 49  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 70 92 1990  
2009  
MINIMUM TEMPERATURE (F) 45 31 1972  
1987  
 
SUNRISE AND SUNSET  
APRIL 27 2021.........SUNRISE 6:16 AM EDT SUNSET 7:59 PM EDT  
APRIL 28 2021.........SUNRISE 6:15 AM EDT SUNSET 8:00 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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