202  
CDUS41 KLWX 190530  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
127 AM EDT FRI OCT 19 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 18 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 58 237 PM 85 2016 68 -10 70  
MINIMUM 36 1144 PM 27 1982 43 -7 36  
1976  
AVERAGE 47 55 -8 53  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 2.09 1996 0.10 -0.10 0.00  
MONTH TO DATE 1.21 1.88 -0.67 1.48  
SINCE SEP 1 8.57 5.80 2.77 3.23  
SINCE JAN 1 51.83 33.80 18.03 36.23  
 
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 18 10 8 12  
MONTH TO DATE 74 140 -66 65  
SINCE SEP 1 87 196 -109 105  
SINCE JUL 1 87 198 -111 106  
 
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 NW (310)  
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION NW (310)  
AVERAGE WIND SPEED 7.9  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.3  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 86 1100 PM  
LOWEST 36 300 PM  
AVERAGE 61  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 67 87 2016  
MINIMUM TEMPERATURE (F) 43 25 1976  
 
 
SUNRISE AND SUNSET  
OCTOBER 19 2018.......SUNRISE 723 AM EDT SUNSET 626 PM EDT  
OCTOBER 20 2018.......SUNRISE 724 AM EDT SUNSET 624 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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