Diamond Bar weather in December (California, United States of America)

Will it be warm or cold in Diamond Bar this December? Want to know if it's a good time to visit? This page has all the weather details for the month.

Temperatures

Typically, December in Diamond Bar includes pleasant temperatures and moderate rainfall. During December, the winter season is in full swing. Throughout the day, temperatures typically settle at around 19°C. But by evening, they drop to around 7°C. Experience the year's lowest temperatures this month, but they are still mild and pleasant.

Precipitation

Diamond Bar in December usually receives moderate rainfall, averaging around 84 mm for the month. It is the wettest month of the year, so an umbrella might come in handy. When we look at the climate data from the last 30 years, you can expect around 9 days of rain.

Average sunshine

With around 205 hours of sunshine, the days are mostly sunny. It gives a pleasant and vibrant feel to the area.

If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit Diamond Bar. January, February, March, April, May, June, July, August, September, October and November typically offer the best circumstances. While December tends to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Diamond Bar climate page with graphs.

 

Diamond Bar, monthly averages in December

Min Temperature 7°C  

Max Temperature 19°C  

Chance of Rain 30%  

Precipitation 84 mm  

Rainy days 9 days  

Sunshine 205 hours *  

Percentage Sunshine *  

Data from: Corona, the United States of America (28 KM, 17 Miles).

Where to go in the United States of America in December

Find out more about the weather in the United States of America and which places have the best travel conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in this month?

For visitors traveling to Diamond Bar, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling

9/10

Walking

9/10

Camping

4/10

Outdoor sports

9/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Diamond Bar.

Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.