940  
CDUS41 KLWX 170529  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
129 AM EDT SUN JUN 17 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JUNE 16 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 86 422 PM 96 1994 84 2 80  
1991  
MINIMUM 54 458 AM 47 1978 61 -7 68  
AVERAGE 70 73 -3 74  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 2.82 2016 0.13 -0.13 0.06  
MONTH TO DATE 2.98 2.19 0.79 0.24  
SINCE JUN 1 2.98 2.19 0.79 0.24  
SINCE JAN 1 23.63 19.01 4.62 19.33  
 
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 0 0 0  
MONTH TO DATE 5 13 -8 6  
SINCE JUN 1 5 13 -8 6  
SINCE JUL 1 4566 4715 -149 3858  
 
COOLING  
YESTERDAY 5 8 -3 9  
MONTH TO DATE 90 102 -12 112  
SINCE JUN 1 90 102 -12 112  
SINCE JAN 1 282 194 88 249    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION NW (310)  
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION NW (300)  
AVERAGE WIND SPEED 2.9  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.5  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 400 AM  
LOWEST 34 100 PM  
AVERAGE 67  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 85 92 1994  
MINIMUM TEMPERATURE (F) 62 46 1980  
 
 
SUNRISE AND SUNSET  
JUNE 17 2018..........SUNRISE 544 AM EDT SUNSET 838 PM EDT  
JUNE 18 2018..........SUNRISE 544 AM EDT SUNSET 838 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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