597  
CDUS41 KLWX 040528  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
127 AM EDT THU OCT 4 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 3 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 86R 350 PM 86 2007 73 13 74  
2002  
MINIMUM 65 641 AM 30 2003 49 16 44  
1974  
AVERAGE 76 61 15 59  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.86 1987 0.10 -0.10 0.00  
MONTH TO DATE 0.00 0.31 -0.31 0.00  
SINCE SEP 1 7.36 4.23 3.13 1.75  
SINCE JAN 1 50.62 32.23 18.39 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 6 -6 6  
MONTH TO DATE 0 17 -17 22  
SINCE SEP 1 13 73 -60 62  
SINCE JUL 1 13 75 -62 63  
 
COOLING  
YESTERDAY 11 1 10 0  
MONTH TO DATE 29 5 24 0  
SINCE SEP 1 270 146 124 155  
SINCE JAN 1 1454 1162 292 1216    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION W (270)  
AVERAGE WIND SPEED 3.9  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.6  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 100 AM  
LOWEST 51 200 PM  
AVERAGE 76  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 72 90 2013  
MINIMUM TEMPERATURE (F) 48 26 1974  
 
 
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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