469  
CDUS41 KLWX 180524  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1224 AM EST SAT JAN 18 2025  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 17 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 44 2:30 PM 70 1990 42 2 30  
MINIMUM 32 4:46 AM -7 1982 25 7 8  
AVERAGE 38 34 4 19  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.14 1994 0.10 -0.10 0.00  
MONTH TO DATE 0.82 1.61 -0.79 3.96  
SINCE DEC 1 4.16 4.91 -0.75 9.71  
SINCE JAN 1 0.82 1.61 -0.79 3.96  
 
SNOWFALL (IN)  
YESTERDAY 0.0 4.2 1965 0.3 -0.3 0.0  
MONTH TO DATE 9.1 3.2 5.9 4.4  
SINCE DEC 1 9.2 6.0 3.2 4.9  
SINCE JUL 1 9.2 6.3 2.9 4.9  
SNOW DEPTH 1  
 
DEGREE DAYS  
HEATING  
YESTERDAY 27 31 -4 46  
MONTH TO DATE 591 523 68 485  
SINCE DEC 1 1420 1368 52 1160  
SINCE JUL 1 2088 2268 -180 1931  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 0 0 0 0    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION NW (310)  
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION NW (310)  
AVERAGE WIND SPEED 7.2  
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 69 12:00 AM  
LOWEST 43 2:00 PM  
AVERAGE 56  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 70 1990  
MINIMUM TEMPERATURE (F) 25 -1 1994  
 
SUNRISE AND SUNSET  
JANUARY 18 2025.......SUNRISE 7:26 AM EST SUNSET 5:15 PM EST  
JANUARY 19 2025.......SUNRISE 7:25 AM EST SUNSET 5:17 PM EST  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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