Le Mars Weather in September

What's the weather like in Le Mars (Iowa) in September 2025?

The climate in Le Mars during September can be summarized as mild and reasonably dry.

September is in the fall / autumn in Le Mars and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 24°C (75°F), whilst at night 10°C (49°F) is normal.

Le Mars weather averages (imperial / metric)
Daytime temperature 23.8°C 74.8°F
Nightly temperature 9.6°C 49.3°F
Average temperature 16.7°C 62.1°F
Daily sunshine 8.5 hrs
Avg rainfall 74 mm 2.9 ins
Rainy days 9 days
Sea temperature 17.8°C 64.1°F
Humidity 71%
Windspeed 16.9kph 11 mph

On average September is the 5th wettest month of the year in Le Mars with around 74mm 2.9 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 8.5 hours of sunshine per day.

September temperatures in Le Mars

Le Mars average temperature in September

September rainfall

Le Mars average rain in September

September hourly sunshine

Le Mars average rain in September

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 Le Mars in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Le Mars weather stats

Le Mars weather statistics
Hottest month: July 30°C 86°F
Driest month: January 15mm 0.6ins
Sunniest month: July 11.6hrs
Coldest month: January -3.7°C 25.3°F
Wettest month: June 106mm 4.2ins
Map showing location of Le Mars (42.79416, -96.16558) Le Mars map pin © Google

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