180  
CDUS41 KLWX 290527  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
126 AM EDT FRI JUN 29 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JUNE 28 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 87 452 PM 97 1966 87 0 80  
MINIMUM 70 505 AM 44 1970 64 6 50  
AVERAGE 79 76 3 65  
 
PRECIPITATION (IN)  
YESTERDAY 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)  
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 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 7.8  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.5  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 500 AM  
LOWEST 51 400 PM  
AVERAGE 76  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 87 102 2012  
MINIMUM TEMPERATURE (F) 64 47 1970  
 
 
SUNRISE AND SUNSET  
JUNE 29 2018..........SUNRISE 547 AM EDT SUNSET 839 PM EDT  
JUNE 30 2018..........SUNRISE 548 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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