330  
CDUS41 KLWX 280543  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
143 AM EDT TUE AUG 28 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 27 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 92 233 PM 100 1987 86 6 77  
MINIMUM 68 528 AM 46 1969 63 5 57  
AVERAGE 80 74 6 67  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.98 1971 0.10 -0.10 0.00  
MONTH TO DATE 4.53 3.12 1.41 3.12  
SINCE JUN 1 19.91 10.77 9.14 13.20  
SINCE JAN 1 40.56 27.59 12.97 32.29  
 
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 9 6 2  
MONTH TO DATE 316 287 29 254  
SINCE JUN 1 924 887 37 913  
SINCE JAN 1 1116 979 137 1050    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 9 HIGHEST WIND DIRECTION W (280)  
HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION W (260)  
AVERAGE WIND SPEED 2.3  
 
 
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 1200 AM  
LOWEST 56 400 PM  
AVERAGE 78  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 85 98 1993  
MINIMUM TEMPERATURE (F) 63 44 1986  
 
 
SUNRISE AND SUNSET  
AUGUST 28 2018........SUNRISE 635 AM EDT SUNSET 746 PM EDT  
AUGUST 29 2018........SUNRISE 636 AM EDT SUNSET 745 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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