819  
CDUS41 KLWX 290526  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1226 AM EST SUN DEC 29 2024  
   
...............................  
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 28 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 52 5:47 PM 73 1984 44 8 62  
MINIMUM 40 3:09 AM 8 1966 27 13 49  
AVERAGE 46 35 11 56  
 
PRECIPITATION (IN)  
YESTERDAY 0.49 1.74 1967 0.10 0.39 0.01  
MONTH TO DATE 2.86 3.03 -0.17 5.75  
SINCE DEC 1 2.86 3.03 -0.17 5.75  
SINCE JAN 1 33.89 42.97 -9.08 34.78  
 
SNOWFALL (IN)  
YESTERDAY 0.0 2.3 1993 0.1 -0.1 0.0  
MONTH TO DATE 0.1 2.4 -2.3 0.5  
SINCE DEC 1 0.1 2.4 -2.3 0.5  
SINCE JUL 1 0.1 2.7 -2.6 0.5  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 19 30 -11 9  
MONTH TO DATE 786 756 30 609  
SINCE DEC 1 786 756 30 609  
SINCE JUL 1 1454 1656 -202 1380  
 
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 10 HIGHEST WIND DIRECTION S (190)  
HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION S (180)  
AVERAGE WIND SPEED 4.8  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
RAIN  
LIGHT RAIN  
FOG  
FOG W/VISIBILITY <= 1/4 MILE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 97 2:00 AM  
LOWEST 89 12:00 AM  
AVERAGE 93  
   
......................................................  
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 44 78 1984  
MINIMUM TEMPERATURE (F) 27 7 1977  
 
SUNRISE AND SUNSET  
DECEMBER 29 2024......SUNRISE 7:28 AM EST SUNSET 4:56 PM EST  
DECEMBER 30 2024......SUNRISE 7:28 AM EST SUNSET 4:57 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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