849  
CDUS43 KLSX 200727  
CLISTL  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE ST LOUIS MO  
227 AM CDT SAT SEP 20 2025  
   
...............................  
 
   
..THE ST. LOUIS CLIMATE SUMMARY FOR SEPTEMBER 19 2025  
 
CLIMATE NORMAL PERIOD 1991 TO 2020  
CLIMATE RECORD PERIOD 1874 TO 2025  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................  
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 87 443 PM 96 1925 80 7 92  
1931  
1955  
MINIMUM 67 618 AM 42 1938 60 7 65  
AVERAGE 77 70 7 79  
 
PRECIPITATION (IN)  
YESTERDAY T 1.82 1954 0.09 -0.09 0.00  
MONTH TO DATE 0.17 1.95 -1.78 0.08  
SINCE SEP 1 0.17 1.95 -1.78 0.08  
SINCE JAN 1 32.26 31.62 0.64 31.76  
 
SNOWFALL (IN)  
YESTERDAY 0.0 0.0 2015 0.0 0.0 0.0  
MONTH TO DATE 0.0 0.0 0.0 0.0  
SINCE SEP 1 0.0 0.0 0.0 0.0  
SINCE JUL 1 0.0 0.0 0.0 0.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 4 7 -3 3  
SINCE SEP 1 4 7 -3 3  
SINCE JUL 1 4 8 -4 3  
 
COOLING  
YESTERDAY 12 6 6 14  
MONTH TO DATE 180 161 19 172  
SINCE SEP 1 180 161 19 172  
SINCE JAN 1 1701 1611 90 1880    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION E (90)  
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION SW (230)  
AVERAGE WIND SPEED 5.4  
 
SKY COVER  
AVERAGE SKY COVER 0.7  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 90 400 AM  
LOWEST 40 500 PM  
AVERAGE 65  
   
......................................................  
 
THE ST. LOUIS CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 80 97 2017  
2022  
MINIMUM TEMPERATURE (F) 59 40 1875  
 
SUNRISE AND SUNSET  
SEPTEMBER 20 2025.....SUNRISE 648 AM CDT SUNSET 701 PM CDT  
SEPTEMBER 21 2025.....SUNRISE 649 AM CDT SUNSET 700 PM CDT  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 
 
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