432  
CDUS41 KLWX 142124  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
424 PM EST THU DEC 14 2023  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 14 2023
 
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1960 TO 2023  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 50 3:27 PM 69 2015 47 3 42  
MINIMUM 23 7:38 AM 3 1989 29 -6 20  
AVERAGE 37 38 -1 31  
 
PRECIPITATION (IN)  
TODAY 0.00 1.24 2020 0.11 -0.11 T  
MONTH TO DATE 2.46 1.59 0.87 0.40  
SINCE DEC 1 2.46 1.59 0.87 0.40  
SINCE JAN 1 31.49 41.53 -10.04 36.21  
 
SNOWFALL (IN)  
TODAY 0.0 3.6 2003 0.1 -0.1 0.0  
MONTH TO DATE 0.5 1.1 -0.6 0.0  
SINCE DEC 1 0.5 1.1 -0.6 0.0  
SINCE JUL 1 0.5 1.4 -0.9 T  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 28 27 1 34  
MONTH TO DATE 308 357 -49 348  
SINCE DEC 1 308 357 -49 348  
SINCE JUL 1 1079 1257 -178 1182  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 1380 1231 149 1376    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION NW (300)  
AVERAGE WIND SPEED 3.5  
 
SKY COVER  
AVERAGE SKY COVER 0.2  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 78 6:00 AM  
LOWEST 25 2:00 PM  
AVERAGE 52  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 47 71 1971  
MINIMUM TEMPERATURE (F) 29 5 1989  
 
SUNRISE AND SUNSET  
DECEMBER 14 2023......SUNRISE 7:20 AM EST SUNSET 4:48 PM EST  
DECEMBER 15 2023......SUNRISE 7:21 AM EST SUNSET 4:49 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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