San Diego weather in January 2021

Get the latest coronavirus (COVID-19) updates for the USA with current travel advice, statistics and online resources.

  • 19°C maximum daytime temperature in January in San Diego19
    19°C max day temperature
  • 8 hours of sunshine per day
  • 6 days with some rainfall in January in San Diego6
    6 days with some rainfall
  • 7°C minimum night-time temperature in January in San Diego7
    7°C min night temperature
  • 10 hours of daylight per day in January in San Diego10
    10 hours of daylight per day
  • No heat & humidity in January in San Diego0
    No heat & humidity
  • 53 mm monthly rainfall in January in San Diego53
    53 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in January in San Diego3
    3 (Moderate) UV index
  • 15°C sea temperature in January in San Diego15
    15°C sea temperature
  • Top deals & discounts
  • San Diego weather overview
  • San Diego climate averages by month
  • More destinations
  • Best time to go to San Diego
  • San Diego 5-day weather forecast

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

The January weather guide for San Diego, California shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Recommended for California

  • Save on holidays in 2020/2021 with latest deals & discounts
  • Offers include free upgrades & extras + low deposits
  • Browse the best deals or search by destination & date

How hot is it in San Diego in January?

Daytime temperatures usually reach 19°C in San Diego in January, falling to 7°C at night.

How sunny is it in San Diego in January?

There are normally 8 hours of bright sunshine each day in San Diego in January - that's 76% of daylight hours.

How warm is the sea around San Diego in January?

The average sea temperature around San Diego in January is 15°C.

Does it rain in San Diego in January?

There are usually 6 days with some rain in San Diego in January and the average monthly rainfall is 53mm.

San Diego sunrise & sunset times for January 2021

Browse the sunrise & sunset times for San Diego in January 2021. Select a month to view San Diego sunrise & sunset times for the next twelve months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st January 2021 06:51 16:54
Saturday, 16th January 2021 06:51 17:07
Sunday, 31st January 2021 06:44 17:21
  • Save on return flights to worldwide destinations with KLM
  • Book flights to Abu Dhabi, Jo'burg, Tokyo & more
  • Plus more flights to the Americas, Middle East & Europe

Metric (°C / mm)  |  Imperial (°F / inches)

Back to top

Discover more about California

Where is hot in California in January for 2021/2022?

Below are average maximum temperatures at popular destinations in California in January. Select a destination to see more weather parameters.

More destinations & map >>

Related posts

Popular travel offers

Top ^

*affiliate links: find out how we are funded and why this helps us remain free to use.