100  
CDUS41 KLWX 250526  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
125 AM EDT THU OCT 25 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 24 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 56 322 PM 84 2001 66 -10 71  
MINIMUM 41 1153 PM 15 1969 41 0 54  
AVERAGE 49 53 -4 63  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.69 2009 0.11 -0.11 0.50  
MONTH TO DATE 1.28 2.50 -1.22 2.01  
SINCE SEP 1 8.64 6.42 2.22 3.76  
SINCE JAN 1 51.90 34.42 17.48 36.76  
 
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 16 12 4 2  
MONTH TO DATE 167 207 -40 94  
SINCE SEP 1 180 263 -83 134  
SINCE JUL 1 180 265 -85 135  
 
COOLING  
YESTERDAY 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 21 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION NW (330)  
AVERAGE WIND SPEED 10.2  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.3  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 79 700 AM  
LOWEST 38 100 PM  
AVERAGE 59  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 65 77 1963  
MINIMUM TEMPERATURE (F) 41 27 1969  
 
 
SUNRISE AND SUNSET  
OCTOBER 25 2018.......SUNRISE 730 AM EDT SUNSET 618 PM EDT  
OCTOBER 26 2018.......SUNRISE 731 AM EDT SUNSET 616 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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