542  
CDUS41 KLWX 282123  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
523 PM EDT WED APR 28 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 28 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 88R 2:33 PM 88 1981 71 17 53  
1983  
1990  
MINIMUM 57 5:19 AM 32 1972 46 11 39  
1993  
AVERAGE 73 58 15 46  
 
PRECIPITATION (IN)  
TODAY 0.00 1.68 2002 0.12 -0.12 0.10  
MONTH TO DATE 2.22 3.24 -1.02 4.18  
SINCE MAR 1 4.49 6.62 -2.13 6.17  
SINCE JAN 1 10.65 12.04 -1.39 12.74  
 
SNOWFALL (IN)  
TODAY MM 0.0 2001 0.0 MM 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 MM  
 
DEGREE DAYS  
HEATING  
TODAY 0 8 -8 19  
MONTH TO DATE 296 323 -27 371  
SINCE MAR 1 811 970 -159 819  
SINCE JUL 1 4004 4560 -556 3963  
 
COOLING  
TODAY 8 1 7 0  
MONTH TO DATE 13 16 -3 0  
SINCE MAR 1 17 19 -2 3  
SINCE JAN 1 17 19 -2 3    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION W (250)  
AVERAGE WIND SPEED 5.8  
 
SKY COVER  
AVERAGE SKY COVER 0.7  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 87 6:00 AM  
LOWEST 34 1:00 PM  
AVERAGE 61  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 71 89 2017  
MINIMUM TEMPERATURE (F) 46 32 1987  
 
SUNRISE AND SUNSET  
APRIL 28 2021.........SUNRISE 6:15 AM EDT SUNSET 8:00 PM EDT  
APRIL 29 2021.........SUNRISE 6:14 AM EDT SUNSET 8:01 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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