871  
CDUS41 KLWX 160524  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
123 AM EDT TUE OCT 16 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 15 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 70 746 PM 88 1989 68 2 79  
MINIMUM 54 156 AM 28 1987 44 10 61  
AVERAGE 62 56 6 70  
 
PRECIPITATION (IN)  
YESTERDAY 0.15 1.30 2014 0.10 0.05 T  
MONTH TO DATE 1.21 1.58 -0.37 1.40  
SINCE SEP 1 8.57 5.50 3.07 3.15  
SINCE JAN 1 51.83 33.50 18.33 36.15  
 
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 3 9 -6 0  
MONTH TO DATE 42 110 -68 32  
SINCE SEP 1 55 166 -111 72  
SINCE JUL 1 55 168 -113 73  
 
COOLING  
YESTERDAY 0 0 0 5  
MONTH TO DATE 97 16 81 64  
SINCE SEP 1 338 157 181 219  
SINCE JAN 1 1522 1173 349 1280    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 23 HIGHEST WIND DIRECTION NW (310)  
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION NW (310)  
AVERAGE WIND SPEED 10.4  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 100 AM  
LOWEST 78 1100 PM  
AVERAGE 89  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 68 85 1989  
MINIMUM TEMPERATURE (F) 44 30 1986  
 
 
SUNRISE AND SUNSET  
OCTOBER 16 2018.......SUNRISE 720 AM EDT SUNSET 630 PM EDT  
OCTOBER 17 2018.......SUNRISE 721 AM EDT SUNSET 628 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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