991  
CDUS41 KLWX 230624  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
224 AM EDT FRI MAY 23 2025  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 22 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 70 1:11 PM 91 2022 76 -6 91  
MINIMUM 54 1:29 AM 31 2002 55 -1 64  
AVERAGE 62 66 -4 78  
 
PRECIPITATION (IN)  
YESTERDAY 0.10 2.07 2001 0.16 -0.06 0.00  
MONTH TO DATE 3.96 3.32 0.64 3.16  
SINCE MAR 1 7.39 10.29 -2.90 8.79  
SINCE JAN 1 11.81 15.84 -4.03 16.24  
 
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 3 0 0  
MONTH TO DATE 34 96 -62 47  
SINCE MAR 1 725 1063 -338 726  
SINCE JUL 1 4047 4573 -526 3690  
 
COOLING  
YESTERDAY 0 3 -3 13  
MONTH TO DATE 68 47 21 69  
SINCE MAR 1 115 69 46 113  
SINCE JAN 1 115 69 46 116    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 23 HIGHEST WIND DIRECTION W (260)  
HIGHEST GUST SPEED 36 HIGHEST GUST DIRECTION W (260)  
AVERAGE WIND SPEED 6.9  
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 6:00 AM  
LOWEST 53 2:00 PM  
AVERAGE 77  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 77 92 1964  
2021  
MINIMUM TEMPERATURE (F) 55 39 1971  
1990  
2002  
 
SUNRISE AND SUNSET  
MAY 23 2025...........SUNRISE 5:51 AM EDT SUNSET 8:23 PM EDT  
MAY 24 2025...........SUNRISE 5:50 AM EDT SUNSET 8:24 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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