345  
CDUS41 KLWX 300523  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
123 AM EDT THU AUG 30 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 29 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 94 357 PM 98 1991 85 9 67  
MINIMUM 74 536 AM 38 1982 62 12 61  
AVERAGE 84 74 10 64  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.17 1963 0.10 -0.10 0.71  
MONTH TO DATE 4.53 3.32 1.21 3.83  
SINCE JUN 1 19.91 10.97 8.94 13.91  
SINCE JAN 1 40.56 27.79 12.77 33.00  
 
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 1  
MONTH TO DATE 0 0 0 1  
SINCE JUN 1 5 15 -10 7  
SINCE JUL 1 0 0 0 1  
 
COOLING  
YESTERDAY 19 9 10 0  
MONTH TO DATE 353 305 48 254  
SINCE JUN 1 961 905 56 913  
SINCE JAN 1 1153 997 156 1050    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION SW (210)  
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION SW (220)  
AVERAGE WIND SPEED 4.1  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.4  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 100 AM  
LOWEST 44 400 PM  
AVERAGE 72  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 85 99 1991  
MINIMUM TEMPERATURE (F) 62 41 1986  
 
 
SUNRISE AND SUNSET  
AUGUST 30 2018........SUNRISE 637 AM EDT SUNSET 743 PM EDT  
AUGUST 31 2018........SUNRISE 638 AM EDT SUNSET 742 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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