Watsonville Weather in December

The climate in Watsonville during December can be summarized as cool and a little damp.

December is in the winter in Watsonville and is typically the coldest month of the year. Daytime maximum temperatures average around a cool 15°C (58°F), whilst at night 3°C (38°F) is normal.

On average December is the 2nd wettest month of the year in Watsonville with around 90mm 3.5 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.

On the flip side this corresponds to an average of 5.4 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 Watsonville in December 2025.