502  
CDUS41 KLWX 082128  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
528 PM EDT THU MAY 08 2025  
   
...............................  
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 8 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 77 12:39 PM 90 2000 73 4 86  
MINIMUM 52 3:57 AM 29 1974 51 1 65  
AVERAGE 65 62 3 76  
 
PRECIPITATION (IN)  
TODAY 0.01 2.10 1960 0.15 -0.14 0.00  
MONTH TO DATE 0.88 1.14 -0.26 1.50  
SINCE MAR 1 4.31 8.11 -3.80 7.13  
SINCE JAN 1 8.73 13.66 -4.93 14.58  
 
SNOWFALL (IN)  
TODAY 0.0 MM MM 0.0 0.0 0.0  
MONTH TO DATE 0.0 0.0 0.0 0.0  
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 0 5 -5 0  
MONTH TO DATE 2 44 -42 15  
SINCE MAR 1 693 1011 -318 694  
SINCE JUL 1 4015 4521 -506 3658  
 
COOLING  
TODAY 0 2 -2 11  
MONTH TO DATE 29 12 17 40  
SINCE MAR 1 76 34 42 84  
SINCE JAN 1 76 34 42 87    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION SW (220)  
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION SW (210)  
AVERAGE WIND SPEED 1.9  
 
SKY COVER  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 97 3:00 AM  
LOWEST 48 11:00 AM  
AVERAGE 73  
   
......................................................  
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 74 91 1963  
MINIMUM TEMPERATURE (F) 51 30 1976  
 
SUNRISE AND SUNSET  
MAY 8 2025...........SUNRISE 6:04 AM EDT SUNSET 8:09 PM EDT  
MAY 9 2025...........SUNRISE 6:03 AM EDT SUNSET 8:10 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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