821  
CDUS41 KLWX 222122  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
522 PM EDT MON OCT 22 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 22 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 56 359 PM 85 1979 66 -10 75  
MINIMUM 29 406 AM 26 1974 42 -13 44  
AVERAGE 43 54 -11 60  
 
PRECIPITATION (IN)  
TODAY 0.00 0.90 1985 0.10 -0.10 0.00  
MONTH TO DATE 1.28 2.29 -1.01 1.48  
SINCE SEP 1 8.64 6.21 2.43 3.23  
SINCE JAN 1 51.90 34.21 17.69 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 22 11 11 5  
MONTH TO DATE 140 183 -43 90  
SINCE SEP 1 153 239 -86 130  
SINCE JUL 1 153 241 -88 131  
 
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 17 HIGHEST WIND DIRECTION SW (210)  
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION S (200)  
AVERAGE WIND SPEED 6.8  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.2  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 200 AM  
LOWEST 46 100 PM  
AVERAGE 73  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 66 85 1978  
MINIMUM TEMPERATURE (F) 41 21 1969  
 
 
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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