994  
CDUS41 KLWX 130526  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
126 AM EDT MON AUG 13 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 12 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 83 102 PM 98 2002 87 -4 84  
MINIMUM 68 1159 PM 51 1962 65 3 68  
AVERAGE 76 76 0 76  
 
PRECIPITATION (IN)  
YESTERDAY 0.12 2.07 1996 0.12 0.00 0.09  
MONTH TO DATE 1.59 1.46 0.13 2.04  
SINCE JUN 1 16.97 9.11 7.86 12.12  
SINCE JAN 1 37.62 25.93 11.69 31.21  
 
SNOWFALL (IN)  
YESTERDAY 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  
YESTERDAY 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  
YESTERDAY 11 11 0 11  
MONTH TO DATE 166 133 33 105  
SINCE JUN 1 774 733 41 764  
SINCE JAN 1 966 825 141 901    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION N (340)  
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION N (350)  
AVERAGE WIND SPEED 4.6  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.7  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
RAIN  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 700 PM  
LOWEST 65 100 PM  
AVERAGE 83  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 87 99 2016  
MINIMUM TEMPERATURE (F) 65 50 1964  
 
 
SUNRISE AND SUNSET  
AUGUST 13 2018........SUNRISE 621 AM EDT SUNSET 807 PM EDT  
AUGUST 14 2018........SUNRISE 622 AM EDT SUNSET 806 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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