Mammoth Lakes Weather in October

The climate in Mammoth Lakes during October can be summarized as cool and reasonably dry.

October is in the fall / autumn in Mammoth Lakes and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a cool 14°C (57°F), whilst at night -2°C (29°F) is normal.

On average October is the 6th driest month of the year in Mammoth Lakes with around 36mm 1.4 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 4 days, although this may vary considerably.

On the flip side this corresponds to an average of 9.7 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 Mammoth Lakes in October 2025.