Saint Charles Weather in October

What's the weather like in Saint Charles (Missouri) in October 2025?

The climate in Saint Charles during October can be summarized as mild and reasonably dry.

October is in the fall / autumn in Saint Charles and is typically the 6th warmest month of the year. Daytime maximum temperatures average around 20°C (69°F), whilst at night 9°C (48°F) is normal.

Saint Charles weather averages (imperial / metric)
Daytime temperature 20.4°C 68.6°F
Nightly temperature 8.7°C 47.6°F
Average temperature 14.5°C 58.1°F
Daily sunshine 7.3 hrs
Avg rainfall 68 mm 2.7 ins
Rainy days 8 days
Sea temperature 17.1°C 62.8°F
Humidity 69%
Windspeed 15.8kph 10 mph

On average October is the 4th driest month of the year in Saint Charles with around 68mm 2.7 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.

On the flip side this corresponds to an average of 7.3 hours of sunshine per day.

October temperatures in Saint Charles

Saint Charles average temperature in October

October rainfall

Saint Charles average rain in October

October hourly sunshine

Saint Charles average rain in October

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Saint Charles in October 2025.

Other monthly averages

Best places to visit in October

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Saint Charles weather stats

Saint Charles weather statistics
Hottest month: July 31.5°C 88.7°F
Driest month: January 44mm 1.7ins
Sunniest month: July 10.7hrs
Coldest month: January 3°C 37.4°F
Wettest month: May 104mm 4.1ins
Map showing location of Saint Charles (38.78394, -90.48123) Saint Charles map pin © Google

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