554  
CDUS41 KLWX 010535  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1235 AM EST WED JAN 01 2025  
   
...............................  
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 31 2024  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1960 TO 2024  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................  
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 61 1:34 PM 73 1992 43 18 51  
MINIMUM 31 6:44 AM 1 1993 27 4 35  
AVERAGE 46 35 11 43  
 
PRECIPITATION (IN)  
YESTERDAY 0.36 1.90 1975 0.09 0.27 T  
MONTH TO DATE 3.34 3.30 0.04 5.75  
SINCE DEC 1 3.34 3.30 0.04 5.75  
SINCE JAN 1 34.37 43.24 -8.87 34.78  
 
SNOWFALL (IN)  
YESTERDAY 0.0 8.5 1970 0.1 -0.1 0.0  
MONTH TO DATE 0.1 2.8 -2.7 0.5  
SINCE DEC 1 0.1 2.8 -2.7 0.5  
SINCE JUL 1 0.1 3.1 -3.0 0.5  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 19 30 -11 22  
MONTH TO DATE 829 846 -17 675  
SINCE DEC 1 829 846 -17 675  
SINCE JUL 1 1497 1746 -249 1446  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 1586 1231 355 1380    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 23 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 35 HIGHEST GUST DIRECTION W (270)  
AVERAGE WIND SPEED 6.3  
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 97 11:00 PM  
LOWEST 49 2:00 PM  
AVERAGE 73  
   
......................................................  
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 68 2005  
MINIMUM TEMPERATURE (F) 27 -6 1968  
 
SUNRISE AND SUNSET  
JANUARY 1 2025.......SUNRISE 7:29 AM EST SUNSET 4:59 PM EST  
JANUARY 2 2025.......SUNRISE 7:29 AM EST SUNSET 5:00 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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