780  
CDUS41 KLWX 120524  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
124 AM EDT FRI OCT 12 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 11 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 80 1246 PM 86 2010 70 10 75  
MINIMUM 64 1159 PM 28 1972 45 19 65  
AVERAGE 72 58 14 70  
 
PRECIPITATION (IN)  
YESTERDAY 0.95 3.38 2013 0.11 0.84 0.79  
MONTH TO DATE 0.96 1.17 -0.21 1.40  
SINCE SEP 1 8.32 5.09 3.23 3.15  
SINCE JAN 1 51.58 33.09 18.49 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 0 8 -8 0  
MONTH TO DATE 0 74 -74 25  
SINCE SEP 1 13 130 -117 65  
SINCE JUL 1 13 132 -119 66  
 
COOLING  
YESTERDAY 7 1 6 5  
MONTH TO DATE 97 13 84 57  
SINCE SEP 1 338 154 184 212  
SINCE JAN 1 1522 1170 352 1273    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 28 HIGHEST WIND DIRECTION NW (330)  
HIGHEST GUST SPEED 37 HIGHEST GUST DIRECTION N (340)  
AVERAGE WIND SPEED 9.8  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 1.0  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
HEAVY RAIN  
RAIN  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 500 AM  
LOWEST 85 1200 PM  
AVERAGE 93  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 69 83 2010  
1995  
MINIMUM TEMPERATURE (F) 45 25 1964  
 
 
SUNRISE AND SUNSET  
OCTOBER 12 2018.......SUNRISE 716 AM EDT SUNSET 636 PM EDT  
OCTOBER 13 2018.......SUNRISE 717 AM EDT SUNSET 634 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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