Diamond Bar Weather in December

What's the weather like in Diamond Bar (California) in December 2024?

The climate in Diamond Bar during December can be summarized as mild and reasonably dry.

December is in the winter in Diamond Bar and is typically the coldest month of the year. Daytime maximum temperatures average around a cool 18°C (65°F), whilst at night 4°C (40°F) is normal.

Diamond Bar weather averages (imperial / metric)
Daytime temperature 18.4°C 65.1°F
Nightly temperature 4.2°C 39.6°F
Average temperature 11.3°C 52.3°F
Daily sunshine 7.6 hrs
Avg rainfall 62 mm 2.4 ins
Rainy days 4 days
Sea temperature 15.3°C 59.6°F
Humidity 63%
Windspeed 10.4kph 7 mph

On average December is the 4th wettest month of the year in Diamond Bar with around 62mm 2.4 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 7.6 hours of sunshine per day.

December temperatures in Diamond Bar

Diamond Bar average temperature in December

December rainfall

Diamond Bar average rain in December

December hourly sunshine

Diamond Bar 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 Diamond Bar 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

Diamond Bar weather stats

Diamond Bar weather statistics
Hottest month: August 32.4°C 90.3°F
Driest month: July 1mm 0ins
Sunniest month: August 11.7hrs
Coldest month: December 18.1°C 64.6°F
Wettest month: February 90mm 3.5ins
Map showing location of Diamond Bar (34.02862, -117.81034) Diamond Bar map pin © Google

Locations nearby

Top United States locations