477  
CDUS41 KLWX 140522  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1222 AM EST TUE JAN 14 2025  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 13 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 46 4:01 PM 69 2005 42 4 49  
MINIMUM 19 7:31 AM -3 1977 25 -6 28  
1981  
AVERAGE 33 34 -1 39  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.03 1964 0.10 -0.10 0.13  
MONTH TO DATE 0.81 1.22 -0.41 3.62  
SINCE DEC 1 4.15 4.52 -0.37 9.37  
SINCE JAN 1 0.81 1.22 -0.41 3.62  
 
SNOWFALL (IN)  
YESTERDAY 0.0 7.7 2019 0.2 -0.2 0.0  
MONTH TO DATE 8.8 2.2 6.6 T  
SINCE DEC 1 8.9 5.0 3.9 0.5  
SINCE JUL 1 8.9 5.3 3.6 0.5  
SNOW DEPTH 3  
 
DEGREE DAYS  
HEATING  
YESTERDAY 32 31 1 26  
MONTH TO DATE 446 399 47 332  
SINCE DEC 1 1275 1244 31 1007  
SINCE JUL 1 1943 2144 -201 1778  
 
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 15 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION W (280)  
AVERAGE WIND SPEED 4.6  
 
SKY COVER  
AVERAGE SKY COVER 0.4  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 81 7:00 AM  
LOWEST 43 4:00 PM  
AVERAGE 62  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 72 1995  
MINIMUM TEMPERATURE (F) 25 5 1970  
 
SUNRISE AND SUNSET  
JANUARY 14 2025.......SUNRISE 7:27 AM EST SUNSET 5:11 PM EST  
JANUARY 15 2025.......SUNRISE 7:27 AM EST SUNSET 5:12 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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