442  
CDUS41 KLWX 272121  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
521 PM EDT SUN APR 27 2025  
   
...............................  
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 27 2025  
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1960 TO 2025  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................  
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 70 3:59 PM 92 1990 71 -1 58  
2009  
MINIMUM 47 5:55 AM 31 1972 47 0 52  
1987  
AVERAGE 59 59 0 55  
 
PRECIPITATION (IN)  
TODAY 0.00 1.65 1973 0.13 -0.13 0.15  
MONTH TO DATE 1.92 3.08 -1.16 1.60  
SINCE MAR 1 3.34 6.58 -3.24 5.49  
SINCE JAN 1 7.76 12.13 -4.37 12.94  
 
SNOWFALL (IN)  
TODAY 0.0 T 1994 0.0 0.0 0.0  
MONTH TO DATE 0.0 0.1 -0.1 T  
SINCE MAR 1 0.0 4.0 -4.0 T  
SINCE JUL 1 15.5 21.0 -5.5 11.7  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 6 7 -1 10  
MONTH TO DATE 231 300 -69 215  
SINCE MAR 1 681 947 -266 679  
SINCE JUL 1 4003 4457 -454 3643  
 
COOLING  
TODAY 0 1 -1 0  
MONTH TO DATE 19 16 3 20  
SINCE MAR 1 36 18 18 20  
SINCE JAN 1 36 18 18 23    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 30 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 46 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 17.1  
 
SKY COVER  
AVERAGE SKY COVER 0.3  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 58 6:00 AM  
LOWEST 21 2:00 PM  
AVERAGE 40  
   
......................................................  
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 71 88 1983  
1990  
2021  
MINIMUM TEMPERATURE (F) 48 32 1972  
1993  
 
SUNRISE AND SUNSET  
APRIL 27 2025.........SUNRISE 6:16 AM EDT SUNSET 7:59 PM EDT  
APRIL 28 2025.........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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