287  
CDUS41 KLWX 280523  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1223 AM EST SAT NOV 28 2020  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR NOVEMBER 27 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 3:31 PM 70 2011 53 8 57  
MINIMUM 45 11:37 PM 11 1974 32 13 38  
AVERAGE 53 42 11 48  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 2.59 1993 0.11 -0.11 0.02  
MONTH TO DATE 2.23 3.06 -0.83 1.62  
SINCE SEP 1 8.05 10.23 -2.18 8.00  
SINCE JAN 1 42.27 38.23 4.04 37.84  
 
SNOWFALL (IN)  
YESTERDAY 0.0 2.9 1978 0.1 -0.1 0.0  
MONTH TO DATE 0.0 0.4 -0.4 T  
SINCE SEP 1 0.0 0.4 -0.4 T  
SINCE JUL 1 0.0 0.4 -0.4 T  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 12 23 -11 17  
MONTH TO DATE 349 489 -140 614  
SINCE SEP 1 616 843 -227 799  
SINCE JUL 1 616 845 -229 799  
 
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 6 HIGHEST WIND DIRECTION NW (310)  
HIGHEST GUST SPEED 8 HIGHEST GUST DIRECTION NW (310)  
AVERAGE WIND SPEED 1.3  
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 90 11:00 PM  
LOWEST 54 3:00 PM  
AVERAGE 72  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 52 71 1990  
1998  
MINIMUM TEMPERATURE (F) 32 19 1996  
 
SUNRISE AND SUNSET  
NOVEMBER 28 2020......SUNRISE 7:07 AM EST SUNSET 4:49 PM EST  
NOVEMBER 29 2020......SUNRISE 7:08 AM EST SUNSET 4:48 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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