523  
CDUS41 KLWX 060524  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1224 AM EST MON JAN 06 2025  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 5 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 3:43 PM 69 1997 43 -8 42  
MINIMUM 15 7:56 AM 5 1970 26 -11 20  
AVERAGE 25 34 -9 31  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.11 1993 0.10 -0.10 0.00  
MONTH TO DATE 0.05 0.47 -0.42 0.01  
SINCE DEC 1 3.39 3.77 -0.38 5.76  
SINCE JAN 1 0.05 0.47 -0.42 0.01  
 
SNOWFALL (IN)  
YESTERDAY 0.0 6.4 1980 0.2 -0.2 0.0  
MONTH TO DATE 0.2 0.7 -0.5 T  
SINCE DEC 1 0.3 3.5 -3.2 0.5  
SINCE JUL 1 0.3 3.8 -3.5 0.5  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 40 31 9 34  
MONTH TO DATE 157 151 6 140  
SINCE DEC 1 986 996 -10 815  
SINCE JUL 1 1654 1896 -242 1586  
 
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 NW (320)  
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION NW (300)  
AVERAGE WIND SPEED 4.3  
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 73 8:00 AM  
LOWEST 29 1:00 PM  
AVERAGE 51  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 71 2007  
MINIMUM TEMPERATURE (F) 26 4 1977  
1999  
 
SUNRISE AND SUNSET  
JANUARY 6 2025.......SUNRISE 7:29 AM EST SUNSET 5:03 PM EST  
JANUARY 7 2025.......SUNRISE 7:29 AM EST SUNSET 5:04 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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