286  
CDUS41 KLWX 041245  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
745 AM EST TUE DEC 4 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 3 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 58 117 PM 74 1998 50 8 56  
MINIMUM 43 1159 PM 7 1976 30 13 30  
AVERAGE 51 40 11 43  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.14 1967 0.11 -0.11 0.04  
MONTH TO DATE 0.32 0.33 -0.01 0.04  
SINCE DEC 1 0.32 0.33 -0.01 0.04  
SINCE JAN 1 61.30 38.91 22.39 39.93  
 
SNOWFALL (IN)  
YESTERDAY 0.0 T 2005 0.0 0.0  
1989  
1983  
MONTH TO DATE 0.0 0.2 -0.2  
SINCE JUL 1 3.0 0.7 2.3  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 14 25 -11 22  
MONTH TO DATE 61 73 -12 71  
SINCE DEC 1 61 73 -12 71  
SINCE JUL 1 1019 989 30 865  
 
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 22 HIGHEST WIND DIRECTION NW (310)  
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION NW (310)  
AVERAGE WIND SPEED 9.8  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.5  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 1200 AM  
LOWEST 43 100 PM  
AVERAGE 72  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 50 75 1998  
MINIMUM TEMPERATURE (F) 30 10 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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