Rancho Cucamonga Weather in December

What's the weather like in Rancho Cucamonga (California) in December 2024?

The climate in Rancho Cucamonga during December can be summarized as mild and reasonably dry.

December is in the winter in Rancho Cucamonga and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a cool 19°C (66°F), whilst at night 4°C (39°F) is normal.

Rancho Cucamonga weather averages (imperial / metric)
Daytime temperature 18.6°C 65.5°F
Nightly temperature 4°C 39.2°F
Average temperature 11.3°C 52.3°F
Daily sunshine 7.7 hrs
Avg rainfall 58 mm 2.3 ins
Rainy days 4 days
Sea temperature 15.3°C 59.6°F
Humidity 63%
Windspeed 10.8kph 7 mph

On average December is the 4th wettest month of the year in Rancho Cucamonga with around 58mm 2.3 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 7.7 hours of sunshine per day.

December temperatures in Rancho Cucamonga

Rancho Cucamonga average temperature in December

December rainfall

Rancho Cucamonga average rain in December

December hourly sunshine

Rancho Cucamonga 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 Rancho Cucamonga in December 2024.

Other monthly averages

Best places to visit in December

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Rancho Cucamonga weather stats

Rancho Cucamonga weather statistics
Hottest month: August 33.2°C 91.8°F
Driest month: July 1mm 0ins
Sunniest month: August 11.7hrs
Coldest month: January 18.2°C 64.8°F
Wettest month: January 84mm 3.3ins
Map showing location of Rancho Cucamonga (34.1064, -117.59311) Rancho Cucamonga map pin © Google

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