593  
CDUS41 KLWX 262134  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
533 PM EDT WED SEP 26 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 26 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 86 249 PM 93 2007 75 11 85  
MINIMUM 71 719 AM 38 1983 52 19 66  
1964  
AVERAGE 79 64 15 76  
 
PRECIPITATION (IN)  
TODAY 0.00 2.15 1975 0.13 -0.13 0.00  
MONTH TO DATE 5.24 3.39 1.85 1.75  
SINCE SEP 1 5.24 3.39 1.85 1.75  
SINCE JAN 1 48.50 31.39 17.11 34.75  
 
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 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  
TODAY 14 2 12 11  
MONTH TO DATE 239 133 106 135  
SINCE SEP 1 239 133 106 135  
SINCE JAN 1 1423 1149 274 1196    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION S (200)  
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION S (200)  
AVERAGE WIND SPEED 7.5  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.7  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 1200 AM  
LOWEST 65 200 PM  
AVERAGE 83  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 75 96 1998  
MINIMUM TEMPERATURE (F) 51 35 1984  
 
 
SUNRISE AND SUNSET  
SEPTEMBER 26 2018.....SUNRISE 701 AM EDT SUNSET 700 PM EDT  
SEPTEMBER 27 2018.....SUNRISE 702 AM EDT SUNSET 659 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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