Union City weather in December (California, United States of America)

Will it be warm or cold in Union City this December? Thinking about a visit? Explore this page for a full overview of the weather conditions this month.

Temperatures

December in Union City generally includes moderate temperatures and moderate rainfall. December ushers in the winter season. Throughout the day, temperatures typically settle at around 15°C. But by evening, they drop to around 6°C. December often features the most temperate temperatures compared to other months.

Precipitation

Union City in December usually receives moderate rainfall, averaging around 81 mm for the month. The month brings the most rain, so be prepared with an umbrella for the occasional shower. Expect around 11 days of rain based on historical data.

Average sunshine

The area experiences a moderate amount of sunshine, with approximately 160 hours of sunlight expected. This makes it neither too gloomy nor overly bright.

If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit Union City. April, May, June, July, August, September and October generally stand out with the best circumstances. While January, February and December tend to showcase less optimal conditions.

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

 

Union City, monthly averages in December

Min Temperature 6°C  

Max Temperature 15°C  

Chance of Rain 38%  

Precipitation 81 mm  

Rainy days 11 days  

Humidity 78% *  

Sunshine 160 hours *  

Percentage Sunshine 54% *  

Data from: San Francisco, the United States of America (26 KM, 16 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?

Plan on layering your clothes. Some days or part of the day it will be nice and warm and some moments it can be a bit chilly. Bring a rain jacket in case it rains during your stay.

What To Do

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

Swimming

5/10

Cycling

6/10

Walking

6/10

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 Union City.

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.