165  
CDUS41 KLWX 030525  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1225 AM EST THU DEC 03 2020  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 2 2020
 
 
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)  
YESTERDAY  
MAXIMUM 48 3:35 PM 75 1970 51 -3 43  
MINIMUM 34 10:53 PM 0 1967 31 3 37  
AVERAGE 41 41 0 40  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.42 1986 0.11 -0.11 0.01  
MONTH TO DATE 0.01 0.22 -0.21 0.40  
SINCE DEC 1 0.01 0.22 -0.21 0.40  
SINCE JAN 1 43.66 38.80 4.86 38.24  
 
SNOWFALL (IN)  
YESTERDAY 0.0 T 1983 0.1 -0.1 T  
1987  
2019  
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  
YESTERDAY 24 24 0 25  
MONTH TO DATE 46 48 -2 49  
SINCE DEC 1 46 48 -2 49  
SINCE JUL 1 713 964 -251 912  
 
COOLING  
YESTERDAY 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 29 HIGHEST WIND DIRECTION NW (300)  
HIGHEST GUST SPEED 38 HIGHEST GUST DIRECTION NW (300)  
AVERAGE WIND SPEED 11.4  
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 66 7:00 AM  
LOWEST 31 4:00 PM  
AVERAGE 49  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 50 74 1998  
MINIMUM TEMPERATURE (F) 30 7 1976  
 
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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