989  
CDUS41 KLWX 300524  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1224 AM EST MON NOV 30 2020  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR NOVEMBER 29 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 58 2:51 PM 73 1998 52 6 50  
MINIMUM 28 6:27 AM 17 1967 32 -4 38  
AVERAGE 43 42 1 44  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 2.04 1963 0.12 -0.12 0.00  
MONTH TO DATE 2.23 3.29 -1.06 1.62  
SINCE SEP 1 8.05 10.46 -2.41 8.00  
SINCE JAN 1 42.27 38.46 3.81 37.84  
 
SNOWFALL (IN)  
YESTERDAY 0.0 3.3 1995 0.1 -0.1 0.0  
MONTH TO DATE 0.0 0.5 -0.5 T  
SINCE SEP 1 0.0 0.5 -0.5 T  
SINCE JUL 1 0.0 0.5 -0.5 T  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 22 23 -1 21  
MONTH TO DATE 390 535 -145 654  
SINCE SEP 1 657 889 -232 839  
SINCE JUL 1 657 891 -234 839  
 
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 13 HIGHEST WIND DIRECTION SW (210)  
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION S (200)  
AVERAGE WIND SPEED 4.2  
 
SKY COVER  
AVERAGE SKY COVER 0.4  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 92 5:00 AM  
LOWEST 35 1:00 PM  
AVERAGE 64  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 51 72 1991  
MINIMUM TEMPERATURE (F) 31 11 1976  
 
SUNRISE AND SUNSET  
NOVEMBER 30 2020......SUNRISE 7:09 AM EST SUNSET 4:48 PM EST  
DECEMBER 1 2020......SUNRISE 7:10 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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