Missoula Weather in October

The climate in Missoula during October can be summarized as cool and dry.

October is in the fall / autumn in Missoula and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a cool 13°C (56°F), whilst at night -1°C (30°F) is normal.

On average October is the 2nd driest month of the year in Missoula with around 24mm 0.9 inches of rain making it a 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 6.8 hours of sunshine per day.

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 Missoula in October 2025.