San Bernardino weather in December (California, United States of America)

Will it be rainy or sunny in San Bernardino this December? Want to know if this month is ideal for visiting? Our guide provides detailed weather information.

Temperatures

In December, the weather in San Bernardino generally includes pleasant temperatures and moderate rainfall. December is typically considered a winter month. Throughout the daytime, temperatures often hover around 19°C. However, as the sun sets and evening approaches, there's a noticeable cool-down. Temperatures gently drop to a more temperate 6°C. Expect mild temperatures during this month, but it stays comfortably warm and inviting. It is the coolest month of the year.

Precipitation

San Bernardino in December usually receives moderate rainfall, averaging around 86 mm for the month. This month is known for heavy rainfall, so don't forget your umbrella to stay dry. Past climate data indicates that roughly 7 days will see rain.

Average sunshine

With approximately 205 hours hours of sun, the days are filled with brightness. It makes it a perfect month for outdoor activities.

If you prefer dry days with pleasant temperatures, January, February, March, April, May, June, October and November typically offer the best circumstances. While July and August tend to showcase less optimal conditions.

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

 

San Bernardino, monthly averages in December

Min Temperature 6°C  

Max Temperature 19°C  

Chance of Rain 23%  

Precipitation 86 mm  

Rainy days 7 days  

Sunshine 205 hours *  

Percentage Sunshine *  

Data from: Corona, the United States of America (36 KM, 22 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 San Bernardino, 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 San Bernardino.

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.