974  
CDUS41 KLWX 092131  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
530 PM EDT TUE OCT 9 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 9 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 82 324 PM 94 2007 70 12 87  
MINIMUM 69 115 AM 26 2001 46 23 69  
AVERAGE 76 58 18 78  
 
PRECIPITATION (IN)  
TODAY 0.00 2.53 1976 0.11 -0.11 0.52  
MONTH TO DATE T 0.95 -0.95 0.61  
SINCE SEP 1 7.36 4.87 2.49 2.36  
SINCE JAN 1 50.62 32.87 17.75 35.36  
 
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 8 -8 0  
MONTH TO DATE 0 58 -58 25  
SINCE SEP 1 13 114 -101 65  
SINCE JUL 1 13 116 -103 66  
 
COOLING  
TODAY 11 1 10 13  
MONTH TO DATE 79 11 68 41  
SINCE SEP 1 320 152 168 196  
SINCE JAN 1 1504 1168 336 1257    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION S (160)  
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION S (170)  
AVERAGE WIND SPEED 3.7  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.8  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 1200 AM  
LOWEST 63 300 PM  
AVERAGE 82  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 70 87 2017  
MINIMUM TEMPERATURE (F) 46 31 1978  
1972  
 
 
SUNRISE AND SUNSET  
OCTOBER 9 2018.......SUNRISE 713 AM EDT SUNSET 640 PM EDT  
OCTOBER 10 2018.......SUNRISE 714 AM EDT SUNSET 639 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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