419  
CDUS41 KLWX 180524  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1224 AM EST WED NOV 18 2020  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR NOVEMBER 17 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 56 10:48 AM 75 1963 57 -1 44  
MINIMUM 32 1:30 AM 17 1976 35 -3 34  
AVERAGE 44 46 -2 39  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.03 1987 0.11 -0.11 0.00  
MONTH TO DATE 2.03 1.91 0.12 0.29  
SINCE SEP 1 7.85 9.08 -1.23 6.67  
SINCE JAN 1 42.07 37.08 4.99 36.51  
 
SNOWFALL (IN)  
YESTERDAY 0.0 T 1965 0.0 0.0 0.0  
1967  
1980  
MONTH TO DATE 0.0 0.1 -0.1 T  
SINCE SEP 1 0.0 0.1 -0.1 T  
SINCE JUL 1 0.0 0.1 -0.1 T  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 21 19 2 26  
MONTH TO DATE 182 279 -97 398  
SINCE SEP 1 449 633 -184 583  
SINCE JUL 1 449 635 -186 583  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 1 0 1 0  
SINCE SEP 1 154 160 -6 289  
SINCE JAN 1 1406 1176 230 1524    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 32 HIGHEST WIND DIRECTION NW (300)  
HIGHEST GUST SPEED 47 HIGHEST GUST DIRECTION NW (310)  
AVERAGE WIND SPEED 14.2  
 
SKY COVER  
AVERAGE SKY COVER 0.4  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 67 2:00 AM  
LOWEST 37 3:00 PM  
AVERAGE 52  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 57 76 1963  
MINIMUM TEMPERATURE (F) 35 18 2014  
 
SUNRISE AND SUNSET  
NOVEMBER 18 2020......SUNRISE 6:56 AM EST SUNSET 4:53 PM EST  
NOVEMBER 19 2020......SUNRISE 6:58 AM EST SUNSET 4:53 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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