188  
CDUS41 KLWX 200530  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
128 AM EDT WED JUN 20 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JUNE 19 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 93 112 PM 98 1994 85 8 87  
MINIMUM 71 1134 PM 45 1986 62 9 70  
AVERAGE 82 74 8 79  
 
PRECIPITATION (IN)  
YESTERDAY 0.10 1.99 2003 0.13 -0.03 0.62  
MONTH TO DATE 3.08 2.59 0.49 0.86  
SINCE JUN 1 3.08 2.59 0.49 0.86  
SINCE JAN 1 23.73 19.41 4.32 19.95  
 
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 17 9 8 14  
MONTH TO DATE 136 128 8 156  
SINCE JUN 1 136 128 8 156  
SINCE JAN 1 328 220 108 293    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 32 HIGHEST WIND DIRECTION N (350)  
HIGHEST GUST SPEED 38 HIGHEST GUST DIRECTION N (350)  
AVERAGE WIND SPEED 7.0  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.7  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 1000 PM  
LOWEST 56 1200 PM  
AVERAGE 78  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 85 97 1964  
MINIMUM TEMPERATURE (F) 63 48 2000  
 
 
SUNRISE AND SUNSET  
JUNE 20 2018..........SUNRISE 544 AM EDT SUNSET 839 PM EDT  
JUNE 21 2018..........SUNRISE 545 AM EDT SUNSET 839 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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