975  
CDUS41 KLWX 212135  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
435 PM EST SAT NOV 21 2020  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR NOVEMBER 21 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 67 1:36 PM 76 2007 55 12 54  
MINIMUM 40 3:12 AM 16 1969 34 6 30  
AVERAGE 54 45 9 42  
 
PRECIPITATION (IN)  
TODAY T 0.83 2005 0.12 -0.12 T  
MONTH TO DATE 2.03 2.38 -0.35 0.42  
SINCE SEP 1 7.85 9.55 -1.70 6.80  
SINCE JAN 1 42.07 37.55 4.52 36.64  
 
SNOWFALL (IN)  
TODAY 0.0 0.2 1987 0.1 -0.1 0.0  
MONTH TO DATE 0.0 0.2 -0.2 T  
SINCE SEP 1 0.0 0.2 -0.2 T  
SINCE JUL 1 0.0 0.2 -0.2 T  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 11 20 -9 23  
MONTH TO DATE 263 358 -95 481  
SINCE SEP 1 530 712 -182 666  
SINCE JUL 1 530 714 -184 666  
 
COOLING  
TODAY 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 8 HIGHEST WIND DIRECTION N (350)  
HIGHEST GUST SPEED 10 HIGHEST GUST DIRECTION N (340)  
AVERAGE WIND SPEED 2.0  
 
SKY COVER  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 82 4:00 AM  
LOWEST 54 1:00 PM  
AVERAGE 68  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 55 75 2007  
MINIMUM TEMPERATURE (F) 34 14 1964  
2014  
 
SUNRISE AND SUNSET  
NOVEMBER 21 2020......SUNRISE 7:00 AM EST SUNSET 4:52 PM EST  
NOVEMBER 22 2020......SUNRISE 7:01 AM EST SUNSET 4:51 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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