Townsend Weather in September

What's the weather like in Townsend (Montana) in September 2025?

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

September is in the fall / autumn in Townsend and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a cool 20°C (69°F), whilst at night 4°C (40°F) is normal.

Townsend weather averages (imperial / metric)
Daytime temperature 20.4°C 68.7°F
Nightly temperature 4.2°C 39.6°F
Average temperature 12.3°C 54.1°F
Daily sunshine 9.3 hrs
Avg rainfall 33 mm 1.3 ins
Rainy days 7 days
Sea temperature 13.8°C 56.8°F
Humidity 54%
Windspeed 14.4kph 9 mph

On average September is the 5th wettest month of the year in Townsend with around 33mm 1.3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 7 days, although this may vary considerably.

On the flip side this corresponds to an average of 9.3 hours of sunshine per day.

September temperatures in Townsend

Townsend average temperature in September

September rainfall

Townsend average rain in September

September hourly sunshine

Townsend 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 Townsend 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

Townsend weather stats

Townsend weather statistics
Hottest month: July 28.1°C 82.6°F
Driest month: February 13mm 0.5ins
Sunniest month: July 12.9hrs
Coldest month: January -1.4°C 29.5°F
Wettest month: June 61mm 2.4ins
Map showing location of Townsend (46.3191, -111.5208) Townsend map pin © Google

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