889  
CDUS41 KLWX 030523  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
123 AM EDT MON SEP 3 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 2 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 89 450 PM 99 1980 84 5 61  
MINIMUM 69 545 AM 44 1970 61 8 53  
AVERAGE 79 73 6 57  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.97 1969 0.12 -0.12 0.66  
MONTH TO DATE 0.44 0.23 0.21 0.66  
SINCE SEP 1 0.44 0.23 0.21 0.66  
SINCE JAN 1 43.70 28.23 15.47 33.66  
 
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 8  
MONTH TO DATE 0 0 0 9  
SINCE SEP 1 0 0 0 9  
SINCE JUL 1 0 2 -2 10  
 
COOLING  
YESTERDAY 14 8 6 0  
MONTH TO DATE 28 16 12 0  
SINCE SEP 1 28 16 12 0  
SINCE JAN 1 1212 1032 180 1061    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 7 HIGHEST WIND DIRECTION W (260)  
HIGHEST GUST SPEED 9 HIGHEST GUST DIRECTION W (260)  
AVERAGE WIND SPEED 1.6  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.5  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
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) 84 96 1993  
MINIMUM TEMPERATURE (F) 61 45 1967  
 
 
SUNRISE AND SUNSET  
SEPTEMBER 3 2018.....SUNRISE 640 AM EDT SUNSET 737 PM EDT  
SEPTEMBER 4 2018.....SUNRISE 641 AM EDT SUNSET 735 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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