272  
CDUS41 KLWX 302131  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
528 PM EDT SAT JUN 30 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JUNE 30 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 91 359 PM 98 1964 87 4 92  
MINIMUM 64 516 AM 51 1989 65 -1 70  
AVERAGE 78 76 2 81  
 
PRECIPITATION (IN)  
TODAY 0.00 1.25 1972 0.13 -0.13 T  
MONTH TO DATE 4.17 3.98 0.19 1.28  
SINCE JUN 1 4.17 3.98 0.19 1.28  
SINCE JAN 1 24.82 20.80 4.02 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 15 -10 6  
SINCE JUL 1 4566 4717 -151 3858  
 
COOLING  
TODAY 13 11 2 16  
MONTH TO DATE 241 237 4 256  
SINCE JUN 1 241 237 4 256  
SINCE JAN 1 433 329 104 393    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION S (190)  
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION S (180)  
AVERAGE WIND SPEED 2.6  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.4  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 300 AM  
LOWEST 38 300 PM  
AVERAGE 69  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 87 96 2012  
MINIMUM TEMPERATURE (F) 65 41 1988  
 
 
SUNRISE AND SUNSET  
JUNE 30 2018..........SUNRISE 548 AM EDT SUNSET 839 PM EDT  
JULY 1 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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