062  
CDUS41 KLWX 020522  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
122 AM EDT SUN SEP 2 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 1 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 86 251 PM 98 1980 84 2 69  
1962  
MINIMUM 72 258 AM 49 1976 62 10 58  
1970  
AVERAGE 79 73 6 64  
 
PRECIPITATION (IN)  
YESTERDAY 0.44 2.76 2006 0.11 0.33 T  
MONTH TO DATE 0.44 0.11 0.33 T  
SINCE SEP 1 0.44 0.11 0.33 T  
SINCE JAN 1 43.70 28.11 15.59 33.00  
 
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 1  
MONTH TO DATE 0 0 0 1  
SINCE SEP 1 0 0 0 1  
SINCE JUL 1 0 2 -2 2  
 
COOLING  
YESTERDAY 14 8 6 0  
MONTH TO DATE 14 8 6 0  
SINCE SEP 1 14 8 6 0  
SINCE JAN 1 1198 1024 174 1061    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION E (100)  
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION E (100)  
AVERAGE WIND SPEED 4.9  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
RAIN  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 200 AM  
LOWEST 70 300 PM  
AVERAGE 85  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 84 99 1980  
MINIMUM TEMPERATURE (F) 61 44 1970  
 
 
SUNRISE AND SUNSET  
SEPTEMBER 2 2018.....SUNRISE 640 AM EDT SUNSET 739 PM EDT  
SEPTEMBER 3 2018.....SUNRISE 640 AM EDT SUNSET 737 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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