Glacier National Park Weather in October

The climate in Glacier National Park during October can be summarized as cool and reasonably dry.

October is in the fall / autumn in Glacier National Park and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a cold 10°C (51°F), whilst at night -1°C (31°F) is normal.

On average October is the driest month of the year in Glacier National Park with around 43mm 1.7 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 6.1 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 Glacier National Park in October 2025.