526  
CDUS41 KLWX 100525  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
125 AM EDT SUN JUN 10 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JUNE 9 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 88 322 PM 97 2011 82 6 80  
MINIMUM 67 1108 PM 43 1975 59 8 52  
AVERAGE 78 71 7 66  
 
PRECIPITATION (IN)  
YESTERDAY 0.16 0.66 1977 0.14 0.02 0.00  
MONTH TO DATE 2.23 1.26 0.97 0.18  
SINCE JUN 1 2.23 1.26 0.97 0.18  
SINCE JAN 1 22.88 18.08 4.80 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 0  
MONTH TO DATE 1 11 -10 6  
SINCE JUN 1 1 11 -10 6  
SINCE JUL 1 4562 4713 -151 3858  
 
COOLING  
YESTERDAY 13 6 7 1  
MONTH TO DATE 55 50 5 23  
SINCE JUN 1 55 50 5 23  
SINCE JAN 1 247 142 105 160    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION E (100)  
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION E (110)  
AVERAGE WIND SPEED 4.1  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.7  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
RAIN  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 100 AM  
LOWEST 50 400 PM  
AVERAGE 75  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 82 99 1964  
MINIMUM TEMPERATURE (F) 60 43 1988  
 
 
SUNRISE AND SUNSET  
JUNE 10 2018..........SUNRISE 544 AM EDT SUNSET 835 PM EDT  
JUNE 11 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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