114  
CDUS41 KLWX 130532  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1232 AM EST FRI NOV 13 2020  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR NOVEMBER 12 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 69 12:00 AM 74 1964 59 10 60  
MINIMUM 49 11:59 PM 22 1973 36 13 28  
1988  
AVERAGE 59 48 11 44  
 
PRECIPITATION (IN)  
YESTERDAY 0.48 1.92 2004 0.10 0.38 0.16  
MONTH TO DATE 2.03 1.35 0.68 0.29  
SINCE SEP 1 7.85 8.52 -0.67 6.67  
SINCE JAN 1 42.07 36.52 5.55 36.51  
 
SNOWFALL (IN)  
YESTERDAY 0.0 4.2 1968 0.0 0.0 T  
MONTH TO DATE 0.0 0.1 -0.1 T  
SINCE SEP 1 0.0 0.1 -0.1 T  
SINCE JUL 1 0.0 0.1 -0.1 T  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 6 17 -11 21  
MONTH TO DATE 110 187 -77 250  
SINCE SEP 1 377 541 -164 435  
SINCE JUL 1 377 543 -166 435  
 
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 21 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION NW (310)  
AVERAGE WIND SPEED 8.4  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
HEAVY RAIN  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 12:00 AM  
LOWEST 65 6:00 PM  
AVERAGE 83  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 59 75 1964  
MINIMUM TEMPERATURE (F) 36 19 2019  
 
SUNRISE AND SUNSET  
NOVEMBER 13 2020......SUNRISE 6:51 AM EST SUNSET 4:57 PM EST  
NOVEMBER 14 2020......SUNRISE 6:52 AM EST SUNSET 4:56 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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