550  
CDUS41 KLWX 132128  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
527 PM EDT SAT OCT 13 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 13 2018
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 58 327 PM 84 1989 69 -11 64  
MINIMUM 49 534 AM 30 2012 45 4 58  
1988  
1987  
AVERAGE 54 57 -3 61  
 
PRECIPITATION (IN)  
TODAY 0.06 1.92 2011 0.10 -0.04 T  
MONTH TO DATE 1.02 1.37 -0.35 1.40  
SINCE SEP 1 8.38 5.29 3.09 3.15  
SINCE JAN 1 51.64 33.29 18.35 36.15  
 
SNOWFALL (IN)  
TODAY 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  
TODAY 11 9 2 4  
MONTH TO DATE 19 92 -73 32  
SINCE SEP 1 32 148 -116 72  
SINCE JUL 1 32 150 -118 73  
 
COOLING  
TODAY 0 1 -1 0  
MONTH TO DATE 97 15 82 57  
SINCE SEP 1 338 156 182 212  
SINCE JAN 1 1522 1172 350 1273    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION NW (300)  
AVERAGE WIND SPEED 10.2  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
FOG  
HAZE  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 500 AM  
LOWEST 47 300 PM  
AVERAGE 70  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 69 86 1975  
MINIMUM TEMPERATURE (F) 44 23 1988  
 
 
SUNRISE AND SUNSET  
OCTOBER 13 2018.......SUNRISE 717 AM EDT SUNSET 634 PM EDT  
OCTOBER 14 2018.......SUNRISE 718 AM EDT SUNSET 633 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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