Lake Arrowhead Weather in December

The climate in Lake Arrowhead during December can be summarized as cool and reasonably dry.

December is in the winter in Lake Arrowhead and is typically the coldest month of the year. Daytime maximum temperatures average around a cool 13°C (56°F), whilst at night -1°C (31°F) is normal.

On average December is the 2nd wettest month of the year in Lake Arrowhead with around 61mm 2.4 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 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 Lake Arrowhead in December 2025.