675  
CDUS41 KLWX 300537  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1237 AM EST MON DEC 30 2024  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 29 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 67 2:57 PM 78 1984 44 23 52  
MINIMUM 51 5:01 AM 7 1977 27 24 37  
AVERAGE 59 35 24 45  
 
PRECIPITATION (IN)  
YESTERDAY 0.12 1.27 2013 0.09 0.03 T  
MONTH TO DATE 2.98 3.12 -0.14 5.75  
SINCE DEC 1 2.98 3.12 -0.14 5.75  
SINCE JAN 1 34.01 43.06 -9.05 34.78  
 
SNOWFALL (IN)  
YESTERDAY 0.0 3.3 1962 0.1 -0.1 0.0  
MONTH TO DATE 0.1 2.5 -2.4 0.5  
SINCE DEC 1 0.1 2.5 -2.4 0.5  
SINCE JUL 1 0.1 2.8 -2.7 0.5  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 6 30 -24 20  
MONTH TO DATE 792 786 6 629  
SINCE DEC 1 792 786 6 629  
SINCE JUL 1 1460 1686 -226 1400  
 
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 S (160)  
HIGHEST GUST SPEED 34 HIGHEST GUST DIRECTION S (160)  
AVERAGE WIND SPEED 10.6  
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 3:00 AM  
LOWEST 65 4:00 PM  
AVERAGE 83  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 44 67 1990  
MINIMUM TEMPERATURE (F) 27 4 1963  
 
SUNRISE AND SUNSET  
DECEMBER 30 2024......SUNRISE 7:28 AM EST SUNSET 4:57 PM EST  
DECEMBER 31 2024......SUNRISE 7:28 AM EST SUNSET 4:58 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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