Running Springs Weather in December

What's the weather like in Running Springs (California) in December 2025?

The climate in Running Springs during December can be summarized as cool and reasonably dry.

December is in the winter in Running Springs and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a cold 11°C (51°F), whilst at night -3°C (27°F) is normal.

Running Springs weather averages (imperial / metric)
Daytime temperature 10.5°C 50.8°F
Nightly temperature -2.7°C 27.2°F
Average temperature 3.9°C 39°F
Daily sunshine 8 hrs
Avg rainfall 70 mm 2.8 ins
Rainy days 4 days
Sea temperature 15.3°C 59.6°F
Humidity 60%
Windspeed 12.6kph 8 mph

On average December is the 2nd wettest month of the year in Running Springs with around 70mm 2.8 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 8 hours of sunshine per day.

December temperatures in Running Springs

Running Springs average temperature in December

December rainfall

Running Springs average rain in December

December hourly sunshine

Running Springs average rain in December

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 Running Springs in December 2025.