Union Weather in October

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

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

October is in the fall / autumn in Union and is typically the 6th warmest month of the year. Daytime maximum temperatures average around 20°C (69°F), whilst at night 8°C (46°F) is normal.

Union weather averages (imperial / metric)
Daytime temperature 20.4°C 68.7°F
Nightly temperature 7.6°C 45.7°F
Average temperature 14°C 57.2°F
Daily sunshine 7.6 hrs
Avg rainfall 72 mm 2.8 ins
Rainy days 9 days
Sea temperature 17.3°C 63.2°F
Humidity 69%
Windspeed 15.8kph 10 mph

On average October is the 4th driest month of the year in Union with around 72mm 2.8 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.

On the flip side this corresponds to an average of 7.6 hours of sunshine per day.

October temperatures in Union

Union average temperature in October

October rainfall

Union average rain in October

October hourly sunshine

Union 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 Union 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

Union weather stats

Union weather statistics
Hottest month: July 31.4°C 88.5°F
Driest month: January 45mm 1.8ins
Sunniest month: July 10.8hrs
Coldest month: January 3.2°C 37.8°F
Wettest month: May 111mm 4.4ins
Map showing location of Union (38.45005, -91.00848) Union map pin © Google

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