691  
CDUS41 KLWX 030534  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1232 AM EST MON DEC 3 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 2 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 56 918 PM 75 1970 51 5 52  
MINIMUM 40 413 AM 0 1967 31 9 25  
AVERAGE 48 41 7 39  
 
PRECIPITATION (IN)  
YESTERDAY 0.11 1.42 1986 0.11 0.00 0.00  
MONTH TO DATE 0.32 0.22 0.10 0.00  
SINCE DEC 1 0.32 0.22 0.10 0.00  
SINCE JAN 1 61.30 38.80 22.50 39.89  
 
SNOWFALL (IN)  
YESTERDAY 0.0 T 1987 0.1 -0.1  
1983  
1976  
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 17 24 -7 26  
MONTH TO DATE 47 48 -1 49  
SINCE DEC 1 47 48 -1 49  
SINCE JUL 1 1005 964 41 843  
 
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 13 HIGHEST WIND DIRECTION S (200)  
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION S (200)  
AVERAGE WIND SPEED 4.1  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
FOG W/VISIBILITY <= 1/4 MILE  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 1200 AM  
LOWEST 93 1200 PM  
AVERAGE 97  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 50 74 1998  
MINIMUM TEMPERATURE (F) 30 7 1976  
 
 
SUNRISE AND SUNSET  
DECEMBER 3 2018......SUNRISE 711 AM EST SUNSET 448 PM EST  
DECEMBER 4 2018......SUNRISE 712 AM EST SUNSET 448 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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