589  
CDUS41 KLWX 172123  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
523 PM EDT SAT MAY 17 2025  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 17 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 86 3:59 PM 93 1960 75 11 71  
MINIMUM 65 2:40 AM 30 1984 53 12 59  
AVERAGE 76 64 12 65  
 
PRECIPITATION (IN)  
TODAY 0.01 1.22 1970 0.16 -0.15 T  
MONTH TO DATE 3.34 2.53 0.81 2.47  
SINCE MAR 1 6.77 9.50 -2.73 8.10  
SINCE JAN 1 11.19 15.05 -3.86 15.55  
 
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 4 -4 0  
MONTH TO DATE 20 81 -61 45  
SINCE MAR 1 711 1048 -337 724  
SINCE JUL 1 4033 4558 -525 3688  
 
COOLING  
TODAY 11 3 8 0  
MONTH TO DATE 63 32 31 44  
SINCE MAR 1 110 54 56 88  
SINCE JAN 1 110 54 56 91    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION SW (240)  
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION SW (240)  
AVERAGE WIND SPEED 11.4  
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 87 3:00 AM  
LOWEST 31 4:00 PM  
AVERAGE 59  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 75 91 1987  
MINIMUM TEMPERATURE (F) 54 33 1973  
 
SUNRISE AND SUNSET  
MAY 17 2025...........SUNRISE 5:55 AM EDT SUNSET 8:18 PM EDT  
MAY 18 2025...........SUNRISE 5:54 AM EDT SUNSET 8:19 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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