Weather By Day

September St Louis Weather 
September St Louis Weather
Record High: 104°F
Normal High: 80°F
Normal Low: 60°F
Record Low: 36°F
Avg Monthly Rain: 2.96"
Rec 1 Day Rain: 2.89"

St Louis Weather In September

The highest recorded temperature in September for St Louis Missouri for the past 53 years was 104 degrees Fahrenheit, most recently measured on September 1, 1984, while the mean high temperature is 80. The coldest day reported in St Louis in September for the past 53 years was 36 measured on September 23, 1974, and the normal low daily temperature is 60.

United States NWS historical St Louis September Weather data records that on September 29, 1984, the high temperature did not exceed 53 degrees Fahrenheit, the lowest high measured in St Louis in the past 53 years. NWS data also shows that on September 6, 1990, the lowest measured temperature on that day did not drop below 81 degrees, the highest low temperature measured in St Louis in the last 53 years.

National Weather Service data shows that the high temperature in St Louis on September First averages 85 degrees Fahrenheit and the high on the final day of September averages 76 degrees. The low recorded temperature in St Louis on September First averages 65 degrees Fahrenheit and the low temperature on the final day of September averages 54 degrees.

St Louis usually receives an average of 2.96 inches of rain during September. September St Louis Weather records indicate that on September 10, 1984 St Louis received 2.89 inches of precipitation, the highest amount of rain recorded in a single day in September.