327  
CDUS41 KLWX 032123  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
423 PM EST THU DEC 03 2020  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 3 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 53 2:34 PM 74 1998 50 3 47  
MINIMUM 25 7:20 AM 7 1976 30 -5 33  
AVERAGE 39 40 -1 40  
 
PRECIPITATION (IN)  
TODAY 0.00 1.14 1967 0.11 -0.11 0.00  
MONTH TO DATE 0.01 0.33 -0.32 0.40  
SINCE DEC 1 0.01 0.33 -0.32 0.40  
SINCE JAN 1 43.66 38.91 4.75 38.24  
 
SNOWFALL (IN)  
TODAY 0.0 T 1983 0.0 0.0 0.0  
1989  
2005  
MONTH TO DATE 0.0 0.2 -0.2 T  
SINCE DEC 1 0.0 0.2 -0.2 T  
SINCE JUL 1 0.0 0.7 -0.7 T  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 26 25 1 25  
MONTH TO DATE 72 73 -1 74  
SINCE DEC 1 72 73 -1 74  
SINCE JUL 1 739 989 -250 937  
 
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 12 HIGHEST WIND DIRECTION S (200)  
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION SW (210)  
AVERAGE WIND SPEED 3.1  
 
SKY COVER  
AVERAGE SKY COVER 0.4  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 81 7:00 AM  
LOWEST 27 3:00 PM  
AVERAGE 54  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 50 75 1998  
MINIMUM TEMPERATURE (F) 30 10 1966  
 
SUNRISE AND SUNSET  
DECEMBER 3 2020......SUNRISE 7:12 AM EST SUNSET 4:48 PM EST  
DECEMBER 4 2020......SUNRISE 7:13 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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