Glendive Weather in September

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

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

September is in the fall / autumn in Glendive and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 23°C (73°F), whilst at night 6°C (43°F) is normal.

Glendive weather averages (imperial / metric)
Daytime temperature 23°C 73.3°F
Nightly temperature 6.3°C 43.3°F
Average temperature 14.6°C 58.3°F
Daily sunshine 9 hrs
Avg rainfall 35 mm 1.4 ins
Rainy days 7 days
Sea temperature 13.9°C 57.1°F
Humidity 57%
Windspeed 16.9kph 11 mph

On average September is the 5th wettest month of the year in Glendive with around 35mm 1.4 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 hours of sunshine per day.

September temperatures in Glendive

Glendive average temperature in September

September rainfall

Glendive average rain in September

September hourly sunshine

Glendive 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 Glendive 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

Glendive weather stats

Glendive weather statistics
Hottest month: July 30.9°C 87.6°F
Driest month: February 9mm 0.4ins
Sunniest month: July 12.5hrs
Coldest month: January -4.7°C 23.5°F
Wettest month: June 76mm 3ins
Map showing location of Glendive (47.10529, -104.71246) Glendive map pin © Google

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