991  
CDUS43 KLSX 181840  
CLISTL  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE ST LOUIS MO  
1240 PM CST MON DEC 18 2023  
   
...............................
 
 
   
..THE ST. LOUIS CLIMATE SUMMARY FOR DECEMBER 17 2023
 
 
CLIMATE NORMAL PERIOD 1991 TO 2020  
CLIMATE RECORD PERIOD 1874 TO 2023  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 46 402 PM 72 1908 44 2 34  
MINIMUM 34 1024 PM -3 1875 28 6 24  
AVERAGE 40 36 4 29  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.02 1897 0.08 -0.08 0.00  
1959  
MONTH TO DATE 1.14 1.33 -0.19 1.46  
SINCE DEC 1 1.14 1.33 -0.19 1.46  
SINCE JAN 1 31.99 40.53 -8.54 48.44  
 
SNOWFALL (IN)  
YESTERDAY 0.0 2.0 1897 0.1 -0.1 0.0  
MONTH TO DATE 0.0 1.4 -1.4 T  
SINCE DEC 1 0.0 1.4 -1.4 T  
SINCE JUL 1 0.0 2.3 -2.3 0.8  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 25 29 -4 36  
MONTH TO DATE 324 455 -131 405  
SINCE DEC 1 324 455 -131 405  
SINCE JUL 1 976 1277 -301 1198  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 1942 1713 229 1977    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION W (270)  
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION W (290)  
AVERAGE WIND SPEED 7.3  
 
SKY COVER  
AVERAGE SKY COVER 0.8  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 82 1000 PM  
LOWEST 63 400 PM  
AVERAGE 73  
   
......................................................
 
 
THE ST. LOUIS CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 44 69 1877  
1939  
MINIMUM TEMPERATURE (F) 28 -4 1884  
1983  
 
SUNRISE AND SUNSET  
DECEMBER 18 2023......SUNRISE 714 AM CST SUNSET 442 PM CST  
DECEMBER 19 2023......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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