047  
CDUS41 KLWX 220525  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
125 AM EDT MON OCT 22 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 21 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 52 235 PM 86 1979 67 -15 77  
MINIMUM 34 1159 PM 22 1972 42 -8 42  
AVERAGE 43 54 -11 60  
 
PRECIPITATION (IN)  
YESTERDAY 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)  
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 22 11 11 5  
MONTH TO DATE 118 172 -54 85  
SINCE SEP 1 131 228 -97 125  
SINCE JUL 1 131 230 -99 126  
 
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 29 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 37 HIGHEST GUST DIRECTION NW (330)  
AVERAGE WIND SPEED 14.4  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.6  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
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 TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 66 85 1979  
MINIMUM TEMPERATURE (F) 42 26 1974  
 
 
SUNRISE AND SUNSET  
OCTOBER 22 2018.......SUNRISE 726 AM EDT SUNSET 622 PM EDT  
OCTOBER 23 2018.......SUNRISE 727 AM EDT SUNSET 620 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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