552  
CDUS41 KLWX 170625  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
225 AM EDT TUE JUN 17 2025  
   
...............................  
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JUNE 16 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 68 4:27 PM 96 1991 83 -15 86  
1994  
MINIMUM 63 9:11 AM 47 1978 62 1 56  
AVERAGE 66 73 -7 71  
 
PRECIPITATION (IN)  
YESTERDAY 0.38 2.82 2016 0.14 0.24 0.00  
MONTH TO DATE 5.12 2.35 2.77 0.28  
SINCE JUN 1 5.12 2.35 2.77 0.28  
SINCE JAN 1 19.04 19.59 -0.55 17.58  
 
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 JUN 1 0.0 0.0 0.0 0.0  
SINCE JUL 1 15.5 21.0 -5.5 11.7  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 15 11 4 0  
SINCE JUN 1 15 11 4 0  
SINCE JUL 1 4106 4603 -497 3691  
 
COOLING  
YESTERDAY 1 8 -7 6  
MONTH TO DATE 110 101 9 125  
SINCE JUN 1 110 101 9 125  
SINCE JAN 1 228 207 21 308    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 9 HIGHEST WIND DIRECTION NE (30)  
HIGHEST GUST SPEED 13 HIGHEST GUST DIRECTION NE (40)  
AVERAGE WIND SPEED 4.8  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 97 3:00 AM  
LOWEST 90 12:00 PM  
AVERAGE 94  
   
......................................................  
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 84 96 2022  
MINIMUM TEMPERATURE (F) 63 46 1980  
 
SUNRISE AND SUNSET  
JUNE 17 2025..........SUNRISE 5:44 AM EDT SUNSET 8:38 PM EDT  
JUNE 18 2025..........SUNRISE 5:44 AM EDT SUNSET 8:38 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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