New Ulm Weather in September

What's the weather like in New Ulm (Minnesota) in September 2025?

The climate in New Ulm during September can be summarized as mild and reasonably dry.

September is in the fall / autumn in New Ulm and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 23°C (74°F), whilst at night 10°C (50°F) is normal.

New Ulm weather averages (imperial / metric)
Daytime temperature 23.3°C 73.9°F
Nightly temperature 9.9°C 49.8°F
Average temperature 16.6°C 61.9°F
Daily sunshine 8.5 hrs
Avg rainfall 75 mm 2.9 ins
Rainy days 9 days
Sea temperature 16.8°C 62.2°F
Humidity 72%
Windspeed 17.6kph 11 mph

On average September is the 5th wettest month of the year in New Ulm with around 75mm 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 New Ulm

New Ulm average temperature in September

September rainfall

New Ulm average rain in September

September hourly sunshine

New Ulm 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 New Ulm 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

New Ulm weather stats

New Ulm weather statistics
Hottest month: July 29.4°C 84.9°F
Driest month: January 18mm 0.7ins
Sunniest month: July 11.9hrs
Coldest month: January -5.1°C 22.8°F
Wettest month: July 104mm 4.1ins
Map showing location of New Ulm (44.31246, -94.46053) New Ulm map pin © Google

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