406  
CDUS41 KLWX 130526  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1226 AM EST MON JAN 13 2025  
   
...............................  
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 12 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 41 3:07 PM 70 2017 42 -1 50  
2018  
MINIMUM 25 1:25 AM -4 1977 25 0 27  
AVERAGE 33 34 -1 39  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.91 2018 0.09 -0.09 0.75  
MONTH TO DATE 0.81 1.12 -0.31 3.49  
SINCE DEC 1 4.15 4.42 -0.27 9.24  
SINCE JAN 1 0.81 1.12 -0.31 3.49  
 
SNOWFALL (IN)  
YESTERDAY 0.0 6.1 1996 0.3 -0.3 0.0  
MONTH TO DATE 8.8 2.0 6.8 T  
SINCE DEC 1 8.9 4.8 4.1 0.5  
SINCE JUL 1 8.9 5.1 3.8 0.5  
SNOW DEPTH 4  
 
DEGREE DAYS  
HEATING  
YESTERDAY 32 31 1 26  
MONTH TO DATE 414 368 46 306  
SINCE DEC 1 1243 1213 30 981  
SINCE JUL 1 1911 2113 -202 1752  
 
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 21 HIGHEST WIND DIRECTION NW (300)  
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION NW (300)  
AVERAGE WIND SPEED 5.6  
 
SKY COVER  
AVERAGE SKY COVER 0.4  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 66 7:00 AM  
LOWEST 41 3:00 PM  
AVERAGE 54  
   
......................................................  
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 69 2005  
MINIMUM TEMPERATURE (F) 25 -3 1977  
1981  
 
SUNRISE AND SUNSET  
JANUARY 13 2025.......SUNRISE 7:27 AM EST SUNSET 5:10 PM EST  
JANUARY 14 2025.......SUNRISE 7:27 AM EST SUNSET 5:11 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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