424  
CDUS41 KLWX 050526  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1226 AM EST WED DEC 5 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 4 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 44 1227 AM 75 1998 50 -6 55  
MINIMUM 31 1159 PM 10 1966 30 1 26  
AVERAGE 38 40 -2 41  
 
PRECIPITATION (IN)  
YESTERDAY 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)  
YESTERDAY 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  
YESTERDAY 27 25 2 24  
MONTH TO DATE 88 98 -10 95  
SINCE DEC 1 88 98 -10 95  
SINCE JUL 1 1046 1014 32 889  
 
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 20 HIGHEST WIND DIRECTION NW (330)  
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION NW (330)  
AVERAGE WIND SPEED 9.2  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.8  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
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 TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 49 77 2001  
MINIMUM TEMPERATURE (F) 30 12 1966  
 
 
SUNRISE AND SUNSET  
DECEMBER 5 2018......SUNRISE 713 AM EST SUNSET 447 PM EST  
DECEMBER 6 2018......SUNRISE 714 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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