617  
CDUS41 KLWX 260531  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
131 AM EDT FRI OCT 26 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 25 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 53 205 PM 77 1963 65 -12 64  
MINIMUM 31 553 AM 27 1969 41 -10 50  
AVERAGE 42 53 -11 57  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 3.39 1971 0.10 -0.10 0.00  
MONTH TO DATE 1.28 2.60 -1.32 2.01  
SINCE SEP 1 8.64 6.52 2.12 3.76  
SINCE JAN 1 51.90 34.52 17.38 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 23 12 11 8  
MONTH TO DATE 190 219 -29 102  
SINCE SEP 1 203 275 -72 142  
SINCE JUL 1 203 277 -74 143  
 
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 15 HIGHEST WIND DIRECTION N (360)  
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION N (350)  
AVERAGE WIND SPEED 4.2  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.6  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
HAZE  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 92 600 AM  
LOWEST 45 200 PM  
AVERAGE 69  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 65 82 1978  
MINIMUM TEMPERATURE (F) 41 26 1988  
1987  
1972  
 
 
SUNRISE AND SUNSET  
OCTOBER 26 2018.......SUNRISE 731 AM EDT SUNSET 616 PM EDT  
OCTOBER 27 2018.......SUNRISE 732 AM EDT SUNSET 615 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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