524  
CDUS41 KLWX 150523  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
123 AM EDT WED AUG 15 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 14 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 84 330 PM 100 1985 87 -3 77  
MINIMUM 62 527 AM 49 1983 65 -3 62  
AVERAGE 73 76 -3 70  
 
PRECIPITATION (IN)  
YESTERDAY T 1.12 2008 0.12 -0.12 T  
MONTH TO DATE 1.65 1.69 -0.04 2.04  
SINCE JUN 1 17.03 9.34 7.69 12.12  
SINCE JAN 1 37.68 26.16 11.52 31.21  
 
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 8 11 -3 5  
MONTH TO DATE 185 155 30 119  
SINCE JUN 1 793 755 38 778  
SINCE JAN 1 985 847 138 915    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION NW (300)  
AVERAGE WIND SPEED 6.6  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.7  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 1200 AM  
LOWEST 51 200 PM  
AVERAGE 76  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 87 102 1988  
MINIMUM TEMPERATURE (F) 65 45 1964  
 
 
SUNRISE AND SUNSET  
AUGUST 15 2018........SUNRISE 623 AM EDT SUNSET 805 PM EDT  
AUGUST 16 2018........SUNRISE 624 AM EDT SUNSET 803 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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