796  
CDUS41 KLWX 270526  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
125 AM EDT THU SEP 27 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 26 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 86 249 PM 93 2007 75 11 85  
MINIMUM 70 1159 PM 38 1983 52 18 66  
1964  
AVERAGE 78 64 14 76  
 
PRECIPITATION (IN)  
YESTERDAY 0.10 2.15 1975 0.13 -0.03 0.00  
MONTH TO DATE 5.34 3.39 1.95 1.75  
SINCE SEP 1 5.34 3.39 1.95 1.75  
SINCE JAN 1 48.60 31.39 17.21 34.75  
 
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 4 -4 0  
MONTH TO DATE 11 37 -26 30  
SINCE SEP 1 11 37 -26 30  
SINCE JUL 1 11 39 -28 31  
 
COOLING  
YESTERDAY 13 2 11 11  
MONTH TO DATE 238 133 105 135  
SINCE SEP 1 238 133 105 135  
SINCE JAN 1 1422 1149 273 1196    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION SW (230)  
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION SW (240)  
AVERAGE WIND SPEED 7.0  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.7  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 1200 AM  
LOWEST 65 200 PM  
AVERAGE 83  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 75 96 1998  
MINIMUM TEMPERATURE (F) 51 35 1984  
 
 
SUNRISE AND SUNSET  
SEPTEMBER 27 2018.....SUNRISE 702 AM EDT SUNSET 659 PM EDT  
SEPTEMBER 28 2018.....SUNRISE 703 AM EDT SUNSET 657 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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