272  
CDUS41 KLWX 212134  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
525 PM EDT SUN OCT 21 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 21 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 52 235 PM 86 1979 67 -15 77  
MINIMUM 44 643 AM 22 1972 42 2 42  
AVERAGE 48 54 -6 60  
 
PRECIPITATION (IN)  
TODAY T 2.45 1995 0.11 -0.11 0.00  
MONTH TO DATE 1.28 2.19 -0.91 1.48  
SINCE SEP 1 8.64 6.11 2.53 3.23  
SINCE JAN 1 51.90 34.11 17.79 36.23  
 
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 17 11 6 5  
MONTH TO DATE 113 172 -59 85  
SINCE SEP 1 126 228 -102 125  
SINCE JUL 1 126 230 -104 126  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 97 16 81 64  
SINCE SEP 1 338 157 181 219  
SINCE JAN 1 1522 1173 349 1280    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 29 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 37 HIGHEST GUST DIRECTION NW (330)  
AVERAGE WIND SPEED 16.6  
 
 
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 80 1200 AM  
LOWEST 46 400 PM  
AVERAGE 63  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 66 85 1979  
MINIMUM TEMPERATURE (F) 42 26 1974  
 
 
SUNRISE AND SUNSET  
OCTOBER 21 2018.......SUNRISE 725 AM EDT SUNSET 623 PM EDT  
OCTOBER 22 2018.......SUNRISE 726 AM EDT SUNSET 622 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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