189  
CDUS41 KLWX 060536  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
136 AM EDT MON AUG 6 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 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 91 335 PM 99 1995 88 3 79  
MINIMUM 68 414 AM 54 1992 65 3 62  
1985  
AVERAGE 80 76 4 71  
 
PRECIPITATION (IN)  
YESTERDAY T 1.78 1990 0.13 -0.13 0.00  
MONTH TO DATE 1.47 0.62 0.85 0.09  
SINCE JUN 1 16.85 8.27 8.58 10.17  
SINCE JAN 1 37.50 25.09 12.41 29.26  
 
SNOWFALL (IN)  
YESTERDAY 0.0 MM MM 0.0 0.0  
MONTH TO DATE 0.0 0.0 0.0  
SINCE JUL 1 0.0 0.0 0.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE JUN 1 5 15 -10 6  
SINCE JUL 1 0 0 0 0  
 
COOLING  
YESTERDAY 15 11 4 6  
MONTH TO DATE 64 56 8 56  
SINCE JUN 1 672 656 16 715  
SINCE JAN 1 864 748 116 852    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 9 HIGHEST WIND DIRECTION W (270)  
HIGHEST GUST SPEED 12 HIGHEST GUST DIRECTION W (270)  
AVERAGE WIND SPEED 3.2  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.4  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
LIGHT RAIN  
HAZE  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 1200 AM  
LOWEST 50 200 PM  
AVERAGE 75  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 87 96 2007  
1977  
MINIMUM TEMPERATURE (F) 65 50 1966  
 
 
SUNRISE AND SUNSET  
AUGUST 6 2018........SUNRISE 615 AM EDT SUNSET 816 PM EDT  
AUGUST 7 2018........SUNRISE 616 AM EDT SUNSET 814 PM EDT  
 
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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