812  
CDUS41 KLWX 042124  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
424 PM EST TUE DEC 4 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 4 2018
 
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 44 1227 AM 75 1998 50 -6 55  
MINIMUM 38 712 AM 10 1966 30 8 26  
AVERAGE 41 40 1 41  
 
PRECIPITATION (IN)  
TODAY 0.00 1.18 1993 0.11 -0.11 0.00  
MONTH TO DATE 0.32 0.44 -0.12 0.04  
SINCE DEC 1 0.32 0.44 -0.12 0.04  
SINCE JAN 1 61.30 39.02 22.28 39.93  
 
SNOWFALL (IN)  
TODAY 0.0 T 2016 0.1 -0.1  
2014  
1983  
MONTH TO DATE 0.0 0.3 -0.3  
SINCE JUL 1 3.0 0.8 2.2  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 24 25 -1 24  
MONTH TO DATE 85 98 -13 95  
SINCE DEC 1 85 98 -13 95  
SINCE JUL 1 1043 1014 29 889  
 
COOLING  
TODAY 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 20 HIGHEST WIND DIRECTION NW (330)  
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION NW (330)  
AVERAGE WIND SPEED 10.5  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.8  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 73 200 AM  
LOWEST 50 300 PM  
AVERAGE 62  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 49 77 2001  
MINIMUM TEMPERATURE (F) 30 12 1966  
 
 
SUNRISE AND SUNSET  
DECEMBER 4 2018......SUNRISE 712 AM EST SUNSET 448 PM EST  
DECEMBER 5 2018......SUNRISE 713 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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