378  
CDUS41 KLWX 242137  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
437 PM EST THU DEC 24 2020  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 24 2020
 
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD: 1981 TO 2010  
CLIMATE RECORD PERIOD: 1960 TO 2020  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 58 3:59 PM 71 2015 44 14 52  
MINIMUM 43 3:51 AM 1 1983 25 18 27  
AVERAGE 51 34 17 40  
 
PRECIPITATION (IN)  
TODAY 0.88 2.01 1986 0.09 0.79 0.00  
MONTH TO DATE 4.44 2.39 2.05 2.34  
SINCE DEC 1 4.44 2.39 2.05 2.34  
SINCE JAN 1 48.09 40.97 7.12 40.18  
 
SNOWFALL (IN)  
TODAY 0.0 8.3 1966 0.2 -0.2 0.0  
MONTH TO DATE 2.4 2.5 -0.1 0.6  
SINCE DEC 1 2.4 2.5 -0.1 0.6  
SINCE JUL 1 2.4 3.0 -0.6 0.6  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 14 31 -17 25  
MONTH TO DATE 604 665 -61 665  
SINCE DEC 1 604 665 -61 665  
SINCE JUL 1 1271 1581 -310 1528  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 1406 1178 228 1524    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION SE (140)  
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION SE (140)  
AVERAGE WIND SPEED 5.1  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
HEAVY RAIN  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 97 1:00 PM  
LOWEST 63 1:00 AM  
AVERAGE 80  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 44 71 1964  
1982  
MINIMUM TEMPERATURE (F) 25 -4 1989  
 
SUNRISE AND SUNSET  
DECEMBER 24 2020......SUNRISE 7:26 AM EST SUNSET 4:53 PM EST  
DECEMBER 25 2020......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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