338  
CDUS41 KLWX 140527  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1227 AM EST SAT NOV 14 2020  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR NOVEMBER 13 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 62 3:48 PM 75 1964 59 3 37  
MINIMUM 45 10:35 PM 19 2019 36 9 19  
AVERAGE 54 47 7 28  
 
PRECIPITATION (IN)  
YESTERDAY T 0.87 2012 0.10 -0.10 0.00  
MONTH TO DATE 2.03 1.45 0.58 0.29  
SINCE SEP 1 7.85 8.62 -0.77 6.67  
SINCE JAN 1 42.07 36.62 5.45 36.51  
 
SNOWFALL (IN)  
YESTERDAY 0.0 T 1995 0.0 0.0 0.0  
2012  
2014  
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 11 18 -7 37  
MONTH TO DATE 121 205 -84 287  
SINCE SEP 1 388 559 -171 472  
SINCE JUL 1 388 561 -173 472  
 
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 14 HIGHEST WIND DIRECTION NW (330)  
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION NW (330)  
AVERAGE WIND SPEED 5.1  
 
SKY COVER  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 83 4:00 AM  
LOWEST 42 4:00 PM  
AVERAGE 63  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 58 80 1985  
MINIMUM TEMPERATURE (F) 36 13 1986  
 
SUNRISE AND SUNSET  
NOVEMBER 14 2020......SUNRISE 6:52 AM EST SUNSET 4:56 PM EST  
NOVEMBER 15 2020......SUNRISE 6:53 AM EST SUNSET 4:55 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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