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

What kind of temperatures can you expect in San Ysidro during December? Check out this detailed guide to the month’s weather conditions.

Temperatures

In December, San Ysidro usually has pleasant temperatures and moderate rainfall. Daytime temperatures are expected to be around 19°C, cooling off to about 8°C at night. Expect mild temperatures during this month, but it stays comfortably warm and inviting. It is the coolest month of the year.

Precipitation

San Ysidro in December usually receives moderate rainfall, averaging around 58 mm for the month. Given that this is the rainiest month, it's wise to carry an umbrella to stay dry during unexpected showers. Records from the past 30 years suggest that around 8 days will experience rain.

Average sunshine

The city usually sees around 248 hours of sunlight, indicating many sunny days.

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

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

 

San Ysidro, monthly averages in December

Min Temperature 8°C  

Max Temperature 19°C  

Chance of Rain 27%  

Precipitation 58 mm  

Rainy days 8 days  

Humidity 69% *  

Sunshine 248 hours *  

Percentage Sunshine 81% *  

Data from: Tijuana, Mexico (2 KM, 1 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 Ysidro, 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

10/10

Walking

10/10

Camping

4/10

Outdoor sports

10/10

Interested in more climate information?

This site provides you with all the information you need about the climate in San Ysidro.

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.