937  
CDUS41 KLWX 270522  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
122 AM EDT MON AUG 27 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 26 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 87 414 PM 95 2016 86 1 79  
1998  
1993  
MINIMUM 62 142 AM 48 1977 63 -1 59  
AVERAGE 75 74 1 69  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.48 1965 0.11 -0.11 0.00  
MONTH TO DATE 4.53 3.02 1.51 3.12  
SINCE JUN 1 19.91 10.67 9.24 13.20  
SINCE JAN 1 40.56 27.49 13.07 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 10 9 1 4  
MONTH TO DATE 301 278 23 252  
SINCE JUN 1 909 878 31 911  
SINCE JAN 1 1101 970 131 1048    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION S (190)  
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION S (190)  
AVERAGE WIND SPEED 5.9  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.4  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 100 AM  
LOWEST 51 200 PM  
AVERAGE 76  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 86 100 1987  
MINIMUM TEMPERATURE (F) 63 46 1969  
 
 
SUNRISE AND SUNSET  
AUGUST 27 2018........SUNRISE 634 AM EDT SUNSET 748 PM EDT  
AUGUST 28 2018........SUNRISE 635 AM EDT SUNSET 746 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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