225  
CDUS41 KLWX 240528  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
127 AM EDT WED OCT 24 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 23 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 71 209 PM 85 1978 66 5 75  
MINIMUM 37 533 AM 21 1969 41 -4 51  
AVERAGE 54 54 0 63  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 2.63 1990 0.10 -0.10 0.03  
MONTH TO DATE 1.28 2.39 -1.11 1.51  
SINCE SEP 1 8.64 6.31 2.33 3.26  
SINCE JAN 1 51.90 34.31 17.59 36.26  
 
SNOWFALL (IN)  
YESTERDAY MM MM MM 0.0 MM  
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 11 12 -1 2  
MONTH TO DATE 151 195 -44 92  
SINCE SEP 1 164 251 -87 132  
SINCE JUL 1 164 253 -89 133  
 
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 20 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION NW (300)  
AVERAGE WIND SPEED 7.5  
 
 
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 100 400 AM  
LOWEST 28 500 PM  
AVERAGE 64  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 66 84 2001  
MINIMUM TEMPERATURE (F) 41 15 1969  
 
 
SUNRISE AND SUNSET  
OCTOBER 24 2018.......SUNRISE 728 AM EDT SUNSET 619 PM EDT  
OCTOBER 25 2018.......SUNRISE 730 AM EDT SUNSET 618 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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