660  
CDUS41 KLWX 220522  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1222 AM EST SUN NOV 22 2020  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR NOVEMBER 21 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 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)  
YESTERDAY 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)  
YESTERDAY 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  
YESTERDAY 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  
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 9 HIGHEST WIND DIRECTION NE (30)  
HIGHEST GUST SPEED 13 HIGHEST GUST DIRECTION N (20)  
AVERAGE WIND SPEED 3.3  
 
SKY COVER  
AVERAGE SKY COVER 0.7  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 82 4:00 AM  
LOWEST 54 1:00 PM  
AVERAGE 68  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 55 75 2007  
MINIMUM TEMPERATURE (F) 34 14 1964  
2014  
 
SUNRISE AND SUNSET  
NOVEMBER 22 2020......SUNRISE 7:01 AM EST SUNSET 4:51 PM EST  
NOVEMBER 23 2020......SUNRISE 7:02 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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