362  
CDUS41 KLWX 110530  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
130 AM EDT MON JUN 11 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JUNE 10 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 79 457 PM 99 1964 82 -3 87  
MINIMUM 63 1159 PM 43 1988 60 3 60  
AVERAGE 71 71 0 74  
 
PRECIPITATION (IN)  
YESTERDAY T 1.16 2009 0.13 -0.13 0.00  
MONTH TO DATE 2.23 1.39 0.84 0.18  
SINCE JUN 1 2.23 1.39 0.84 0.18  
SINCE JAN 1 22.88 18.21 4.67 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 12 -11 6  
SINCE JUN 1 1 12 -11 6  
SINCE JUL 1 4562 4714 -152 3858  
 
COOLING  
YESTERDAY 6 7 -1 9  
MONTH TO DATE 61 57 4 32  
SINCE JUN 1 61 57 4 32  
SINCE JAN 1 253 149 104 169    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION NE (60)  
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION NE (60)  
AVERAGE WIND SPEED 5.9  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.8  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 1200 AM  
LOWEST 82 1200 PM  
AVERAGE 91  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 83 95 2016  
MINIMUM TEMPERATURE (F) 60 40 1972  
 
 
SUNRISE AND SUNSET  
JUNE 11 2018..........SUNRISE 544 AM EDT SUNSET 835 PM EDT  
JUNE 12 2018..........SUNRISE 544 AM EDT SUNSET 836 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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