285  
CDUS41 KLWX 192127  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
527 PM EDT MON MAY 19 2025  
   
...............................  
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 19 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 75 3:59 PM 92 1996 76 -1 76  
1997  
MINIMUM 55 3:18 AM 36 2002 54 1 58  
AVERAGE 65 65 0 67  
 
PRECIPITATION (IN)  
TODAY 0.00 1.18 1988 0.15 -0.15 0.00  
MONTH TO DATE 3.34 2.83 0.51 3.16  
SINCE MAR 1 6.77 9.80 -3.03 8.79  
SINCE JAN 1 11.19 15.35 -4.16 16.24  
 
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 3 -3 0  
MONTH TO DATE 20 87 -67 47  
SINCE MAR 1 711 1054 -343 726  
SINCE JUL 1 4033 4564 -531 3690  
 
COOLING  
TODAY 0 3 -3 2  
MONTH TO DATE 68 38 30 46  
SINCE MAR 1 115 60 55 90  
SINCE JAN 1 115 60 55 93    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 25 HIGHEST WIND DIRECTION NW (300)  
HIGHEST GUST SPEED 35 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 11.6  
 
SKY COVER  
AVERAGE SKY COVER 0.2  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 77 3:00 AM  
LOWEST 34 3:00 PM  
AVERAGE 56  
   
......................................................  
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 76 93 1996  
MINIMUM TEMPERATURE (F) 54 36 2002  
 
SUNRISE AND SUNSET  
MAY 19 2025...........SUNRISE 5:54 AM EDT SUNSET 8:19 PM EDT  
MAY 20 2025...........SUNRISE 5:53 AM EDT SUNSET 8:20 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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