395  
CDUS41 KLWX 130522  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
122 AM EDT SAT OCT 13 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 12 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 1221 AM 83 2010 69 -5 66  
1995  
MINIMUM 49 1051 PM 25 1964 45 4 58  
AVERAGE 57 57 0 62  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.78 1990 0.10 -0.10 T  
MONTH TO DATE 0.96 1.27 -0.31 1.40  
SINCE SEP 1 8.32 5.19 3.13 3.15  
SINCE JAN 1 51.58 33.19 18.39 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 8 9 -1 3  
MONTH TO DATE 8 83 -75 28  
SINCE SEP 1 21 139 -118 68  
SINCE JUL 1 21 141 -120 69  
 
COOLING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 97 14 83 57  
SINCE SEP 1 338 155 183 212  
SINCE JAN 1 1522 1171 351 1273    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 28 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 38 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 12.9  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.4  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
HAZE  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 86 1100 PM  
LOWEST 46 200 PM  
AVERAGE 66  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 69 84 1989  
MINIMUM TEMPERATURE (F) 45 30 2012  
1988  
1987  
 
 
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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