Deer Lodge Weather in September

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

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

September is in the fall / autumn in Deer Lodge and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a cool 20°C (68°F), whilst at night 3°C (38°F) is normal.

Deer Lodge weather averages (imperial / metric)
Daytime temperature 19.9°C 67.8°F
Nightly temperature 3.1°C 37.6°F
Average temperature 11.5°C 52.7°F
Daily sunshine 9.1 hrs
Avg rainfall 31 mm 1.2 ins
Rainy days 8 days
Sea temperature 13.7°C 56.7°F
Humidity 57%
Windspeed 13kph 8 mph

On average September is the 5th wettest month of the year in Deer Lodge with around 31mm 1.2 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 9.1 hours of sunshine per day.

September temperatures in Deer Lodge

Deer Lodge average temperature in September

September rainfall

Deer Lodge average rain in September

September hourly sunshine

Deer Lodge 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 Deer Lodge 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

Deer Lodge weather stats

Deer Lodge weather statistics
Hottest month: July 26.9°C 80.4°F
Driest month: February 11mm 0.4ins
Sunniest month: July 12.7hrs
Coldest month: January -1°C 30.2°F
Wettest month: June 56mm 2.2ins
Map showing location of Deer Lodge (46.39576, -112.73004) Deer Lodge map pin © Google

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