325  
CDUS41 KLWX 122126  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
526 PM EDT THU JUL 12 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JULY 12 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 88 351 PM 97 1986 88 0 93  
MINIMUM 67 533 AM 47 2002 66 1 71  
AVERAGE 78 77 1 82  
 
PRECIPITATION (IN)  
TODAY 0.00 2.61 1990 0.11 -0.11 T  
MONTH TO DATE 0.85 1.42 -0.57 3.16  
SINCE JUN 1 5.02 5.40 -0.38 4.44  
SINCE JAN 1 25.67 22.22 3.45 23.53  
 
SNOWFALL (IN)  
TODAY 0.0 MM MM 0.0 0.0  
MONTH TO DATE 0.0 0.0 0.0  
SINCE JUL 1 0.0 0.0 0.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE JUN 1 5 15 -10 6  
SINCE JUL 1 0 0 0 0  
 
COOLING  
TODAY 13 12 1 17  
MONTH TO DATE 161 139 22 157  
SINCE JUN 1 402 376 26 413  
SINCE JAN 1 594 468 126 550    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION NW (330)  
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION N (20)  
AVERAGE WIND SPEED 7.0  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.2  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 68 100 AM  
LOWEST 31 300 PM  
AVERAGE 50  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 88 97 1986  
1966  
MINIMUM TEMPERATURE (F) 66 52 1978  
 
 
SUNRISE AND SUNSET  
JULY 12 2018..........SUNRISE 555 AM EDT SUNSET 836 PM EDT  
JULY 13 2018..........SUNRISE 555 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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