740  
CDUS41 KLWX 282131  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
530 PM EDT THU JUN 28 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JUNE 28 2018
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 87 359 PM 97 1966 87 0 80  
MINIMUM 70 505 AM 44 1970 64 6 50  
AVERAGE 79 76 3 65  
 
PRECIPITATION (IN)  
TODAY T 1.06 1983 0.13 -0.13 0.00  
MONTH TO DATE 4.17 3.73 0.44 1.28  
SINCE JUN 1 4.17 3.73 0.44 1.28  
SINCE JAN 1 24.82 20.55 4.27 20.37  
 
SNOWFALL (IN)  
TODAY 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  
TODAY 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  
TODAY 14 11 3 0  
MONTH TO DATE 215 216 -1 230  
SINCE JUN 1 215 216 -1 230  
SINCE JAN 1 407 308 99 367    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION NW (310)  
AVERAGE WIND SPEED 8.1  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.7  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 500 AM  
LOWEST 51 400 PM  
AVERAGE 76  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 87 102 2012  
MINIMUM TEMPERATURE (F) 64 47 1970  
 
 
SUNRISE AND SUNSET  
JUNE 28 2018..........SUNRISE 547 AM EDT SUNSET 839 PM EDT  
JUNE 29 2018..........SUNRISE 547 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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