159  
CDUS41 KLWX 200534  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
131 AM EDT SAT OCT 20 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 19 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 64 346 PM 87 2016 67 -3 73  
MINIMUM 33 637 AM 25 1976 43 -10 37  
AVERAGE 49 55 -6 55  
 
PRECIPITATION (IN)  
YESTERDAY 0.04 1.36 1966 0.10 -0.06 0.00  
MONTH TO DATE 1.25 1.98 -0.73 1.48  
SINCE SEP 1 8.61 5.90 2.71 3.23  
SINCE JAN 1 51.87 33.90 17.97 36.23  
 
SNOWFALL (IN)  
YESTERDAY MM 0.1 1972 0.0 MM  
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 16 10 6 10  
MONTH TO DATE 90 150 -60 75  
SINCE SEP 1 103 206 -103 115  
SINCE JUL 1 103 208 -105 116  
 
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 18 HIGHEST WIND DIRECTION SW (210)  
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION SW (210)  
AVERAGE WIND SPEED 6.5  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.4  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 1200 AM  
LOWEST 48 100 PM  
AVERAGE 74  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 67 83 2016  
1969  
MINIMUM TEMPERATURE (F) 42 20 1972  
 
 
SUNRISE AND SUNSET  
OCTOBER 20 2018.......SUNRISE 724 AM EDT SUNSET 624 PM EDT  
OCTOBER 21 2018.......SUNRISE 725 AM EDT SUNSET 623 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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