049  
CDUS41 KLWX 150525  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1225 AM EST WED JAN 15 2025  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 14 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 35 3:46 PM 72 1995 42 -7 46  
MINIMUM 24 7:35 AM 5 1970 25 -1 27  
AVERAGE 30 34 -4 37  
 
PRECIPITATION (IN)  
YESTERDAY T 1.79 2005 0.10 -0.10 T  
MONTH TO DATE 0.81 1.32 -0.51 3.62  
SINCE DEC 1 4.15 4.62 -0.47 9.37  
SINCE JAN 1 0.81 1.32 -0.51 3.62  
 
SNOWFALL (IN)  
YESTERDAY T 0.3 1978 0.2 -0.2 T  
MONTH TO DATE 8.8 2.4 6.4 T  
SINCE DEC 1 8.9 5.2 3.7 0.5  
SINCE JUL 1 8.9 5.5 3.4 0.5  
SNOW DEPTH 2  
 
DEGREE DAYS  
HEATING  
YESTERDAY 35 31 4 28  
MONTH TO DATE 481 430 51 360  
SINCE DEC 1 1310 1275 35 1035  
SINCE JUL 1 1978 2175 -197 1806  
 
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 25 HIGHEST WIND DIRECTION NW (330)  
HIGHEST GUST SPEED 35 HIGHEST GUST DIRECTION NW (310)  
AVERAGE WIND SPEED 10.3  
 
SKY COVER  
AVERAGE SKY COVER 0.3  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT SNOW  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 66 10:00 PM  
LOWEST 32 3:00 PM  
AVERAGE 49  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 68 2007  
MINIMUM TEMPERATURE (F) 25 -7 1964  
 
SUNRISE AND SUNSET  
JANUARY 15 2025.......SUNRISE 7:27 AM EST SUNSET 5:12 PM EST  
JANUARY 16 2025.......SUNRISE 7:26 AM EST SUNSET 5:13 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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