Walnut Creek Weather in December

December in Walnut Creek averages 14°C (57°F) during the day and 4°C (39°F) at night. It is the wettest month of the year, with 102 mm (4 in) of rainfall on average, so waterproof gear is a must.

Rainfall in Walnut Creek in December

Expect frequent showers this month, so make sure to have an umbrella to keep yourself dry. Past climate data indicates that roughly 13 days will see rain, totalling around 102 mm (4 in) for the month. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in Walnut Creek in December

December in Walnut Creek sees highs of 14°C (57°F) and lows of 4°C (39°F) overnight. December is part of the winter season. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. Nights fall to 4°C (39°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep. December has the coolest temperatures of the year, but still offering mild weather.

Sunshine in Walnut Creek in December

The area experiences a moderate amount of sunshine, with approximately 160 hours of sunlight expected. This means a decent mix of sun and overcast.

December in Walnut Creek has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.