081  
CDUS41 KLWX 082124  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
524 PM EDT SAT SEP 8 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 8 2018
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 73 1228 AM 96 2016 82 -9 76  
MINIMUM 61 126 PM 43 1984 60 1 48  
AVERAGE 67 71 -4 62  
 
PRECIPITATION (IN)  
TODAY 0.07 3.56 1987 0.12 -0.05 0.00  
MONTH TO DATE 0.71 0.94 -0.23 1.63  
SINCE SEP 1 0.71 0.94 -0.23 1.63  
SINCE JAN 1 43.97 28.94 15.03 34.63  
 
SNOWFALL (IN)  
TODAY 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  
TODAY 0 1 -1 3  
MONTH TO DATE 0 1 -1 17  
SINCE SEP 1 0 1 -1 17  
SINCE JUL 1 0 3 -3 18  
 
COOLING  
TODAY 2 6 -4 0  
MONTH TO DATE 116 59 57 19  
SINCE SEP 1 116 59 57 19  
SINCE JAN 1 1300 1075 225 1080    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION N (350)  
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION N (10)  
AVERAGE WIND SPEED 8.3  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 100 AM  
LOWEST 81 1100 AM  
AVERAGE 91  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 82 98 2016  
MINIMUM TEMPERATURE (F) 59 40 1986  
 
 
SUNRISE AND SUNSET  
SEPTEMBER 8 2018.....SUNRISE 645 AM EDT SUNSET 729 PM EDT  
SEPTEMBER 9 2018.....SUNRISE 646 AM EDT SUNSET 728 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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