821  
CDUS41 KLWX 052135  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
435 PM EST SAT DEC 05 2020  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 5 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 48 12:38 PM 77 2001 49 -1 46  
MINIMUM 43 8:40 AM 12 1966 30 13 30  
AVERAGE 46 40 6 38  
 
PRECIPITATION (IN)  
TODAY 0.59 1.02 2003 0.11 0.48 0.01  
MONTH TO DATE 0.99 0.55 0.44 0.46  
SINCE DEC 1 0.99 0.55 0.44 0.46  
SINCE JAN 1 44.64 39.13 5.51 38.30  
 
SNOWFALL (IN)  
TODAY 0.0 6.2 2002 0.1 -0.1 0.0  
MONTH TO DATE 0.0 0.4 -0.4 T  
SINCE DEC 1 0.0 0.4 -0.4 T  
SINCE JUL 1 0.0 0.9 -0.9 T  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 19 26 -7 27  
MONTH TO DATE 109 124 -15 126  
SINCE DEC 1 109 124 -15 126  
SINCE JUL 1 776 1040 -264 989  
 
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 24 HIGHEST WIND DIRECTION NW (330)  
HIGHEST GUST SPEED 36 HIGHEST GUST DIRECTION NW (330)  
AVERAGE WIND SPEED 14.6  
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 96 12:00 AM  
LOWEST 47 4:00 PM  
AVERAGE 72  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 49 79 1998  
MINIMUM TEMPERATURE (F) 29 9 2002  
 
SUNRISE AND SUNSET  
DECEMBER 5 2020......SUNRISE 7:14 AM EST SUNSET 4:47 PM EST  
DECEMBER 6 2020......SUNRISE 7:15 AM EST SUNSET 4:47 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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