433  
CDUS43 KLSX 170745  
CLISTL  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE ST LOUIS MO  
145 AM CST SUN DEC 17 2017  
 
   
...............................
 
 
   
..THE ST. LOUIS CLIMATE SUMMARY FOR DECEMBER 16 2017
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1874 TO 2017  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 62 254 PM 70 1889 42 20 36  
MINIMUM 36 234 AM -8 1989 26 10 20  
AVERAGE 49 34 15 28  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.16 2001 0.08 -0.08 T  
MONTH TO DATE 0.15 1.53 -1.38 0.30  
SINCE DEC 1 0.15 1.53 -1.38 0.30  
SINCE JAN 1 35.96 39.65 -3.69 40.61  
 
SNOWFALL (IN)  
YESTERDAY 0.0 1.8 2000 0.1 -0.1 T  
MONTH TO DATE T 1.8 -1.8 T  
SINCE DEC 1 T 1.8 -1.8 T  
SINCE JUL 1 T 2.5 -2.5 T  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 16 31 -15 37  
MONTH TO DATE 387 455 -68 515  
SINCE DEC 1 387 455 -68 515  
SINCE JUL 1 1089 1281 -192 1006  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 1959 1646 313 2162    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION SW (220)  
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION SW (210)  
AVERAGE WIND SPEED 11.8  
 
 
SKY COVER  
AVERAGE SKY COVER 0.3  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 70 1200 AM  
LOWEST 25 300 PM  
AVERAGE 48  
   
......................................................
 
 
 
THE ST. LOUIS CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 72 1908  
MINIMUM TEMPERATURE (F) 26 -3 1875  
 
 
SUNRISE AND SUNSET  
DECEMBER 17 2017......SUNRISE 714 AM CST SUNSET 442 PM CST  
DECEMBER 18 2017......SUNRISE 715 AM CST SUNSET 442 PM CST  
 
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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