615  
CDUS41 KLWX 170523  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1223 AM EST TUE NOV 17 2020  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR NOVEMBER 16 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 61 3:10 PM 74 2001 57 4 47  
2005  
MINIMUM 38 10:30 PM 14 1967 35 3 34  
AVERAGE 50 46 4 41  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.75 1989 0.12 -0.12 0.00  
MONTH TO DATE 2.03 1.80 0.23 0.29  
SINCE SEP 1 7.85 8.97 -1.12 6.67  
SINCE JAN 1 42.07 36.97 5.10 36.51  
 
SNOWFALL (IN)  
YESTERDAY 0.0 T 1980 0.0 0.0 0.0  
1995  
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 15 19 -4 24  
MONTH TO DATE 161 260 -99 372  
SINCE SEP 1 428 614 -186 557  
SINCE JUL 1 428 616 -188 557  
 
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 23 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 40 HIGHEST GUST DIRECTION W (280)  
AVERAGE WIND SPEED 9.1  
 
SKY COVER  
AVERAGE SKY COVER 0.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 55 11:00 PM  
LOWEST 18 3:00 PM  
AVERAGE 37  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 57 75 1963  
MINIMUM TEMPERATURE (F) 35 17 1976  
 
SUNRISE AND SUNSET  
NOVEMBER 17 2020......SUNRISE 6:55 AM EST SUNSET 4:54 PM EST  
NOVEMBER 18 2020......SUNRISE 6:56 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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