Challis Weather in October

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

October is in the fall / autumn in Challis and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a cool 15°C (58°F), whilst at night -2°C (29°F) is normal.

On average October is the driest month of the year in Challis with around 17mm 0.6 inches of rain making it a 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 7.8 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 Challis in October 2025.