545  
CDUS41 KLWX 070523  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
123 AM EDT TUE AUG 7 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 6 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 92 406 PM 96 2007 87 5 80  
1977  
MINIMUM 70 539 AM 50 1966 65 5 58  
AVERAGE 81 76 5 69  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 2.49 1986 0.12 -0.12 0.00  
MONTH TO DATE 1.47 0.74 0.73 0.09  
SINCE JUN 1 16.85 8.39 8.46 10.17  
SINCE JAN 1 37.50 25.21 12.29 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 16 11 5 4  
MONTH TO DATE 80 67 13 60  
SINCE JUN 1 688 667 21 719  
SINCE JAN 1 880 759 121 856    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 23 HIGHEST WIND DIRECTION NE (60)  
HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION NE (50)  
AVERAGE WIND SPEED 3.7  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.6  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 300 AM  
LOWEST 49 300 PM  
AVERAGE 75  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 87 97 2007  
MINIMUM TEMPERATURE (F) 65 49 1994  
 
 
SUNRISE AND SUNSET  
AUGUST 7 2018........SUNRISE 616 AM EDT SUNSET 814 PM EDT  
AUGUST 8 2018........SUNRISE 617 AM EDT SUNSET 813 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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