733  
CDUS41 KLWX 240521  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1221 AM EST TUE DEC 24 2024  
   
...............................  
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 23 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 35 3:04 PM 68 1990 45 -10 48  
MINIMUM 14 6:23 AM 4 1989 28 -14 31  
AVERAGE 25 36 -11 40  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.30 2004 0.11 -0.11 0.00  
MONTH TO DATE 2.35 2.54 -0.19 4.73  
SINCE DEC 1 2.35 2.54 -0.19 4.73  
SINCE JAN 1 33.38 42.48 -9.10 33.76  
 
SNOWFALL (IN)  
YESTERDAY 0.0 7.5 1963 0.1 -0.1 0.0  
MONTH TO DATE T 1.9 -1.9 0.5  
SINCE DEC 1 T 1.9 -1.9 0.5  
SINCE JUL 1 T 2.2 -2.2 0.5  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 40 29 11 25  
MONTH TO DATE 654 609 45 530  
SINCE DEC 1 654 609 45 530  
SINCE JUL 1 1322 1509 -187 1301  
 
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 12 HIGHEST WIND DIRECTION S (160)  
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION S (170)  
AVERAGE WIND SPEED 4.7  
 
SKY COVER  
AVERAGE SKY COVER 0.3  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
HAZE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 80 6:00 AM  
LOWEST 45 2:00 PM  
AVERAGE 63  
   
......................................................  
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 45 71 2015  
MINIMUM TEMPERATURE (F) 28 1 1983  
 
SUNRISE AND SUNSET  
DECEMBER 24 2024......SUNRISE 7:26 AM EST SUNSET 4:53 PM EST  
DECEMBER 25 2024......SUNRISE 7:27 AM EST SUNSET 4:54 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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