539  
CDUS41 KLWX 060526  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
126 AM EDT THU SEP 6 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 5 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 92 359 PM 96 1985 83 9 86  
MINIMUM 72 549 AM 42 1997 61 11 65  
AVERAGE 82 72 10 76  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 3.78 1979 0.12 -0.12 0.32  
MONTH TO DATE 0.44 0.59 -0.15 0.98  
SINCE SEP 1 0.44 0.59 -0.15 0.98  
SINCE JAN 1 43.70 28.59 15.11 33.98  
 
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 9  
SINCE SEP 1 0 0 0 9  
SINCE JUL 1 0 2 -2 10  
 
COOLING  
YESTERDAY 17 7 10 11  
MONTH TO DATE 81 39 42 19  
SINCE SEP 1 81 39 42 19  
SINCE JAN 1 1265 1055 210 1080    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION SW (210)  
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION S (200)  
AVERAGE WIND SPEED 2.4  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.3  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 100 AM  
LOWEST 52 400 PM  
AVERAGE 76  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 83 98 1983  
MINIMUM TEMPERATURE (F) 60 45 1976  
1972  
 
 
SUNRISE AND SUNSET  
SEPTEMBER 6 2018.....SUNRISE 643 AM EDT SUNSET 732 PM EDT  
SEPTEMBER 7 2018.....SUNRISE 644 AM EDT SUNSET 731 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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