396  
CDUS41 KLWX 042123  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
523 PM EDT THU OCT 4 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 4 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 89 311 PM 90 2013 72 17 79  
MINIMUM 63 342 AM 26 1974 48 15 44  
AVERAGE 76 60 16 62  
 
PRECIPITATION (IN)  
TODAY 0.00 0.81 1999 0.11 -0.11 0.00  
MONTH TO DATE 0.00 0.42 -0.42 0.00  
SINCE SEP 1 7.36 4.34 3.02 1.75  
SINCE JAN 1 50.62 32.34 18.28 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 6 -6 3  
MONTH TO DATE 0 23 -23 25  
SINCE SEP 1 13 79 -66 65  
SINCE JUL 1 13 81 -68 66  
 
COOLING  
TODAY 11 1 10 0  
MONTH TO DATE 40 6 34 0  
SINCE SEP 1 281 147 134 155  
SINCE JAN 1 1465 1163 302 1216    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION S (190)  
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION S (190)  
AVERAGE WIND SPEED 3.6  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.5  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
FOG  
FOG W/VISIBILITY <= 1/4 MILE  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 200 AM  
LOWEST 55 200 PM  
AVERAGE 78  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 72 90 2013  
1967  
MINIMUM TEMPERATURE (F) 48 32 1970  
 
 
SUNRISE AND SUNSET  
OCTOBER 4 2018.......SUNRISE 709 AM EDT SUNSET 648 PM EDT  
OCTOBER 5 2018.......SUNRISE 709 AM EDT SUNSET 646 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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