920  
CDUS41 KLWX 090521  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
121 AM EDT SAT JUN 9 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JUNE 8 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 85 406 PM 97 2007 82 3 75  
MINIMUM 58 506 AM 36 1977 59 -1 50  
AVERAGE 72 70 2 63  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.71 2014 0.14 -0.14 0.00  
MONTH TO DATE 2.07 1.12 0.95 0.18  
SINCE JUN 1 2.07 1.12 0.95 0.18  
SINCE JAN 1 22.72 17.94 4.78 19.27  
 
SNOWFALL (IN)  
YESTERDAY 0.0 MM MM 0.0 0.0  
MONTH TO DATE 0.0 0.0 0.0  
SINCE JUL 1 11.9 22.0 -10.1  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 1 -1 2  
MONTH TO DATE 1 10 -9 6  
SINCE JUN 1 1 10 -9 6  
SINCE JUL 1 4562 4712 -150 3858  
 
COOLING  
YESTERDAY 7 6 1 0  
MONTH TO DATE 42 44 -2 22  
SINCE JUN 1 42 44 -2 22  
SINCE JAN 1 234 136 98 159    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 9 HIGHEST WIND DIRECTION SW (240)  
HIGHEST GUST SPEED 12 HIGHEST GUST DIRECTION SW (220)  
AVERAGE WIND SPEED 3.2  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.7  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 500 AM  
LOWEST 55 1200 PM  
AVERAGE 78  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 82 97 2011  
MINIMUM TEMPERATURE (F) 59 43 1975  
 
 
SUNRISE AND SUNSET  
JUNE 9 2018..........SUNRISE 544 AM EDT SUNSET 834 PM EDT  
JUNE 10 2018..........SUNRISE 544 AM EDT SUNSET 835 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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