Riverside Weather in December

Riverside in December averages 19°C (66°F) during the day and 6°C (43°F) at night. This is the wettest month of the year, and part of the winter season.

Rainfall in Riverside in December

During the wettest month of the year, an umbrella can be your best friend to stay dry. Based on our climate data of the past 30 years, about 7 days of rain are anticipated, with 62 mm (2.4 in) on average. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.

Temperature in Riverside in December

Expect highs of 19°C (66°F) in Riverside in December, with nights dropping to around 6°C (43°F). The winter season takes place during December. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With lows around 6°C (43°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep. The temperatures this month are cooler, yet they stay comfortably warm and enjoyable.

Sunshine in Riverside in December

The month enjoys around 205 hours of sunshine, creating mostly sunny days with good weather conditions.

If your ideal day consists of dry skies and pleasant temperatures, January, February, March, April, May, October and November typically offer the best circumstances for Riverside.