San Diego weather in January (California, United States of America)

Looking to travel to San Diego in January? This guide provides all the details you need.

In San Diego, January is characterized by pleasant temperatures and moderate rainfall. Anticipate daytime temperatures around 20°C, while night temperatures can drop to 9°C.

San Diego in January usually receives moderate rainfall, averaging around 35 mm for the month. Based on our climate data of the past 30 years, about 5 days of rain are anticipated.

With around 240 hours of sunshine, the days are mostly sunny. It gives a pleasant and vibrant feel to the area.

If you're a fan of comfortable temperatures and drier conditions, January is a great time to visit. 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 Diego climate page with graphs.

 

San Diego, monthly averages in January

Min Temperature 9°C  
Max Temperature 20°C  
Chance of Rain 17%  
Precipitation 35 mm  
Rainy days 5 days  
Humidity 64%  
Sunshine 240 hours  
Percentage Sunshine 75%  

Where to go in the United States of America in January

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

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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 San Diego in January?

For visitors traveling to San Diego, 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 in January.

Cycling
10/10
Walking
10/10
Camping
5/10
Outdoor sports
10/10

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in San Diego.

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 climate conditions. Find out where to go with our weather planner.