009  
CDUS41 KLWX 170533  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
133 AM EDT WED OCT 17 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 16 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 63 1208 AM 85 1989 68 -5 70  
MINIMUM 52 1155 PM 30 1986 44 8 48  
AVERAGE 58 56 2 59  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.10 2002 0.10 -0.10 0.08  
MONTH TO DATE 1.21 1.68 -0.47 1.48  
SINCE SEP 1 8.57 5.60 2.97 3.23  
SINCE JAN 1 51.83 33.60 18.23 36.23  
 
SNOWFALL (IN)  
YESTERDAY 0.0 T 1977 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 7 10 -3 6  
MONTH TO DATE 49 120 -71 38  
SINCE SEP 1 62 176 -114 78  
SINCE JUL 1 62 178 -116 79  
 
COOLING  
YESTERDAY 0 0 0 0  
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 20 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION NW (330)  
AVERAGE WIND SPEED 6.7  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.8  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 89 1000 PM  
LOWEST 47 200 PM  
AVERAGE 68  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 68 84 2016  
MINIMUM TEMPERATURE (F) 43 31 1982  
1981  
 
 
SUNRISE AND SUNSET  
OCTOBER 17 2018.......SUNRISE 721 AM EDT SUNSET 628 PM EDT  
OCTOBER 18 2018.......SUNRISE 722 AM EDT SUNSET 627 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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