Boise Weather in October

The climate in Boise during October can be summarized as mild and dry.

October is in the fall / autumn in Boise and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a cool 18°C (65°F), whilst at night 3°C (38°F) is normal.

On average October is the 4th driest month of the year in Boise with around 19mm 0.8 inches of rain making it a dry time to visit. This rainfall is typically spread over 6 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.3 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 Boise in October 2025.