Montana Weather in October
What's the weather like in Montana (Montana) in October 2025?
The climate in Montana during October can be summarized as mild and reasonably dry.
October is in the fall / autumn in Montana and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a cool 18°C (63°F), whilst at night 7°C (45°F) is normal.
| Daytime temperature | 17.5°C 63.4°F |
|---|---|
| Nightly temperature | 7.2°C 44.9°F |
| Average temperature | 12.3°C 54.1°F |
| Daily sunshine | 5.6 hrs |
| Avg rainfall | 43 mm 1.7 ins |
| Rainy days | 5 days |
| Sea temperature | 18.9°C 66°F |
| Humidity | 76% |
| Windspeed | 7.6kph 5 mph |
On average October is the 4th driest month of the year in Montana with around 43mm 1.7 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 5 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.6 hours of sunshine per day.
October temperatures in Montana
October rainfall
October hourly sunshine
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 Montana in October 2025.
Other monthly averages
Best places to visit in October
Montana weather stats
| Hottest month: | July | 27.7°C 81.9°F |
|---|---|---|
| Driest month: | January | 41mm 1.6ins |
| Sunniest month: | August | 9.7hrs |
| Coldest month: | January | 1.5°C 34.7°F |
| Wettest month: | May | 77mm 3ins |
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