532  
CDUS41 KLWX 270644  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
244 AM EDT TUE MAY 27 2025  
   
...............................  
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 26 2025  
 
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)  
YESTERDAY  
MAXIMUM 72 5:15 PM 92 2007 77 -5 89  
2021  
MINIMUM 52 11:59 PM 38 1967 56 -4 66  
AVERAGE 62 67 -5 78  
 
PRECIPITATION (IN)  
YESTERDAY T 3.59 2009 0.15 -0.15 0.12  
MONTH TO DATE 3.96 3.95 0.01 4.01  
SINCE MAR 1 7.39 10.92 -3.53 9.64  
SINCE JAN 1 11.81 16.47 -4.66 17.09  
 
SNOWFALL (IN)  
YESTERDAY 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  
YESTERDAY 3 2 1 0  
MONTH TO DATE 55 106 -51 47  
SINCE MAR 1 746 1073 -327 726  
SINCE JUL 1 4068 4583 -515 3690  
 
COOLING  
YESTERDAY 0 4 -4 13  
MONTH TO DATE 68 63 5 117  
SINCE MAR 1 115 85 30 161  
SINCE JAN 1 115 85 30 164    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION N (10)  
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION N (360)  
AVERAGE WIND SPEED 3.5  
 
SKY COVER  
AVERAGE SKY COVER 0.7  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 70 10:00 PM  
LOWEST 39 5:00 PM  
AVERAGE 55  
   
......................................................  
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 78 92 1965  
2010  
MINIMUM TEMPERATURE (F) 56 37 1972  
 
SUNRISE AND SUNSET  
MAY 27 2025...........SUNRISE 5:48 AM EDT SUNSET 8:26 PM EDT  
MAY 28 2025...........SUNRISE 5:48 AM EDT SUNSET 8:27 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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