032  
CDUS41 KLWX 212125  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
525 PM EDT TUE AUG 21 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 21 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 79 341 PM 96 1962 86 -7 89  
MINIMUM 71 1225 PM 47 1976 64 7 69  
AVERAGE 75 75 0 79  
 
PRECIPITATION (IN)  
TODAY 0.68 1.43 2014 0.10 0.58 0.00  
MONTH TO DATE 2.49 2.47 0.02 3.12  
SINCE JUN 1 17.87 10.12 7.75 13.20  
SINCE JAN 1 38.52 26.94 11.58 32.29  
 
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 10 10 0 14  
MONTH TO DATE 269 229 40 211  
SINCE JUN 1 877 829 48 870  
SINCE JAN 1 1069 921 148 1007    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION SE (120)  
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION S (170)  
AVERAGE WIND SPEED 8.4  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
THUNDERSTORM  
HEAVY RAIN  
RAIN  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 900 AM  
LOWEST 87 1200 AM  
AVERAGE 94  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 86 101 1983  
MINIMUM TEMPERATURE (F) 64 51 1976  
1969  
 
 
SUNRISE AND SUNSET  
AUGUST 21 2018........SUNRISE 629 AM EDT SUNSET 756 PM EDT  
AUGUST 22 2018........SUNRISE 630 AM EDT SUNSET 755 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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