583  
CDUS41 KLWX 150525  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
125 AM EDT MON OCT 15 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 14 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 57 357 PM 86 1975 69 -12 73  
MINIMUM 40 1239 AM 23 1988 44 -4 61  
AVERAGE 49 56 -7 67  
 
PRECIPITATION (IN)  
YESTERDAY 0.04 1.61 1995 0.11 -0.07 0.00  
MONTH TO DATE 1.06 1.48 -0.42 1.40  
SINCE SEP 1 8.42 5.40 3.02 3.15  
SINCE JAN 1 51.68 33.40 18.28 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 16 9 7 0  
MONTH TO DATE 39 101 -62 32  
SINCE SEP 1 52 157 -105 72  
SINCE JUL 1 52 159 -107 73  
 
COOLING  
YESTERDAY 0 1 -1 2  
MONTH TO DATE 97 16 81 59  
SINCE SEP 1 338 157 181 214  
SINCE JAN 1 1522 1173 349 1275    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 9 HIGHEST WIND DIRECTION S (200)  
HIGHEST GUST SPEED 12 HIGHEST GUST DIRECTION S (200)  
AVERAGE WIND SPEED 3.4  
 
 
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 100 400 AM  
LOWEST 67 300 PM  
AVERAGE 84  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 68 88 1989  
MINIMUM TEMPERATURE (F) 44 28 1987  
 
 
SUNRISE AND SUNSET  
OCTOBER 15 2018.......SUNRISE 719 AM EDT SUNSET 631 PM EDT  
OCTOBER 16 2018.......SUNRISE 720 AM EDT SUNSET 630 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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