219  
CDUS41 KLWX 272122  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
522 PM EDT TUE APR 27 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 27 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 85 3:59 PM 92 1990 70 15 59  
2009  
MINIMUM 42 5:49 AM 31 1972 45 -3 41  
1987  
AVERAGE 64 58 6 50  
 
PRECIPITATION (IN)  
TODAY 0.00 1.65 1973 0.12 -0.12 0.06  
MONTH TO DATE 2.22 3.12 -0.90 4.08  
SINCE MAR 1 4.49 6.50 -2.01 6.07  
SINCE JAN 1 10.65 11.92 -1.27 12.64  
 
SNOWFALL (IN)  
TODAY MM T 1994 0.0 MM 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 MM  
 
DEGREE DAYS  
HEATING  
TODAY 1 8 -7 15  
MONTH TO DATE 296 315 -19 352  
SINCE MAR 1 811 962 -151 800  
SINCE JUL 1 4004 4552 -548 3944  
 
COOLING  
TODAY 0 1 -1 0  
MONTH TO DATE 5 15 -10 0  
SINCE MAR 1 9 18 -9 3  
SINCE JAN 1 9 18 -9 3    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION S (190)  
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION S (200)  
AVERAGE WIND SPEED 4.5  
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 86 2:00 AM  
LOWEST 31 3:00 PM  
AVERAGE 59  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 71 88 1981  
1983  
1990  
MINIMUM TEMPERATURE (F) 46 32 1972  
1993  
 
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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