891  
CDUS41 KLWX 120524  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1224 AM EST THU NOV 12 2020  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR NOVEMBER 11 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 70 6:06 PM 78 2006 60 10 69  
MINIMUM 62 12:00 AM 16 1973 37 25 31  
AVERAGE 66 48 18 50  
 
PRECIPITATION (IN)  
YESTERDAY 1.21R 1.16 1995 0.10 1.11 0.00  
MONTH TO DATE 1.55 1.25 0.30 0.13  
SINCE SEP 1 7.37 8.42 -1.05 6.51  
SINCE JAN 1 41.59 36.42 5.17 36.35  
 
SNOWFALL (IN)  
YESTERDAY 0.0 5.3 1987 0.0 0.0 0.0  
MONTH TO DATE 0.0 0.1 -0.1 0.0  
SINCE SEP 1 0.0 0.1 -0.1 0.0  
SINCE JUL 1 0.0 0.1 -0.1 0.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 17 -17 15  
MONTH TO DATE 104 170 -66 229  
SINCE SEP 1 371 524 -153 414  
SINCE JUL 1 371 526 -155 414  
 
COOLING  
YESTERDAY 1 0 1 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 15 HIGHEST WIND DIRECTION S (190)  
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION S (170)  
AVERAGE WIND SPEED 7.0  
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
HEAVY RAIN  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 10:00 PM  
LOWEST 87 1:00 AM  
AVERAGE 94  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 59 74 1964  
MINIMUM TEMPERATURE (F) 36 22 1973  
1988  
 
SUNRISE AND SUNSET  
NOVEMBER 12 2020......SUNRISE 6:50 AM EST SUNSET 4:58 PM EST  
NOVEMBER 13 2020......SUNRISE 6:51 AM EST SUNSET 4:57 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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