681  
CDUS41 KLWX 060530  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1229 AM EST THU DEC 6 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 5 2018
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1960 TO 2018  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 38 246 PM 77 2001 49 -11 61  
MINIMUM 27 1159 PM 12 1966 30 -3 43  
AVERAGE 33 40 -7 52  
 
PRECIPITATION (IN)  
YESTERDAY T 1.02 2003 0.11 -0.11 0.09  
MONTH TO DATE 0.32 0.55 -0.23 0.13  
SINCE DEC 1 0.32 0.55 -0.23 0.13  
SINCE JAN 1 61.30 39.13 22.17 40.02  
 
SNOWFALL (IN)  
YESTERDAY T 6.2 2002 0.1 -0.1  
MONTH TO DATE T 0.4 -0.4  
SINCE JUL 1 3.0 0.9 2.1  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 32 26 6 13  
MONTH TO DATE 120 124 -4 108  
SINCE DEC 1 120 124 -4 108  
SINCE JUL 1 1078 1040 38 902  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 1522 1178 344 1281    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION NW (300)  
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION W (290)  
AVERAGE WIND SPEED 4.9  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.8  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT SNOW  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 85 300 AM  
LOWEST 54 200 PM  
AVERAGE 70  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 49 79 1998  
MINIMUM TEMPERATURE (F) 29 9 2002  
 
 
SUNRISE AND SUNSET  
DECEMBER 6 2018......SUNRISE 714 AM EST SUNSET 447 PM EST  
DECEMBER 7 2018......SUNRISE 715 AM EST SUNSET 447 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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