088  
CDUS41 KLWX 212134  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
434 PM EST SAT DEC 21 2024  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 21 2024
 
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 38 2:34 PM 70 2013 45 -7 45  
MINIMUM 30 2:37 AM 4 1989 28 2 24  
AVERAGE 34 37 -3 35  
 
PRECIPITATION (IN)  
TODAY 0.00 1.15 1973 0.10 -0.10 0.00  
MONTH TO DATE 2.35 2.33 0.02 4.73  
SINCE DEC 1 2.35 2.33 0.02 4.73  
SINCE JAN 1 33.38 42.27 -8.89 33.76  
 
SNOWFALL (IN)  
TODAY 0.0 5.8 1962 0.1 -0.1 0.0  
MONTH TO DATE T 1.7 -1.7 0.5  
SINCE DEC 1 T 1.7 -1.7 0.5  
SINCE JUL 1 T 2.0 -2.0 0.5  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 31 28 3 30  
MONTH TO DATE 574 551 23 480  
SINCE DEC 1 574 551 23 480  
SINCE JUL 1 1242 1451 -209 1251  
 
COOLING  
TODAY 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 25 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 39 HIGHEST GUST DIRECTION N (350)  
AVERAGE WIND SPEED 14.4  
 
SKY COVER  
AVERAGE SKY COVER 0.7  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 82 12:00 AM  
LOWEST 36 12:00 PM  
AVERAGE 59  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 45 71 2013  
MINIMUM TEMPERATURE (F) 28 2 1989  
 
SUNRISE AND SUNSET  
DECEMBER 21 2024......SUNRISE 7:25 AM EST SUNSET 4:51 PM EST  
DECEMBER 22 2024......SUNRISE 7:26 AM EST SUNSET 4:52 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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