997  
CDUS41 KLWX 092132  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
432 PM EST THU JAN 09 2025  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 9 2025
 
 
VALID TODAY AS OF 0400 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 31 3:59 PM 64 2008 42 -11 59  
MINIMUM 18 4:19 AM -8 1970 26 -8 38  
AVERAGE 25 34 -9 49  
 
PRECIPITATION (IN)  
TODAY 0.00 1.76 2024 0.09 -0.09 1.76  
MONTH TO DATE 0.69 0.83 -0.14 2.74  
SINCE DEC 1 4.03 4.13 -0.10 8.49  
SINCE JAN 1 0.69 0.83 -0.14 2.74  
 
SNOWFALL (IN)  
TODAY 0.0 3.5 1997 0.2 -0.2 0.0  
MONTH TO DATE 6.2 1.3 4.9 T  
SINCE DEC 1 6.3 4.1 2.2 0.5  
SINCE JUL 1 6.3 4.4 1.9 0.5  
SNOW DEPTH 4  
 
DEGREE DAYS  
HEATING  
TODAY 40 31 9 16  
MONTH TO DATE 309 275 34 238  
SINCE DEC 1 1138 1120 18 913  
SINCE JUL 1 1806 2020 -214 1684  
 
COOLING  
TODAY 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 30 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 43 HIGHEST GUST DIRECTION NW (300)  
AVERAGE WIND SPEED 16.2  
 
SKY COVER  
AVERAGE SKY COVER 0.2  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 59 4:00 AM  
LOWEST 36 3:00 PM  
AVERAGE 48  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 59 2016  
MINIMUM TEMPERATURE (F) 25 0 1982  
 
SUNRISE AND SUNSET  
JANUARY 9 2025.......SUNRISE 7:28 AM EST SUNSET 5:06 PM EST  
JANUARY 10 2025.......SUNRISE 7:28 AM EST SUNSET 5:07 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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