- Save on top attractions, activities & tours in San Diego
- Includes SeaWorld, USS Midway Museum & more
- Book online with AttractionTickets.com
San Diego weather
Get the latest coronavirus (COVID-19) updates for the USA with current travel advice, statistics and online resources.
-
Usually
in August
-
Now
Today
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
The weather guide for San Diego, California shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by MeteoBlue. Find out more about our data sources.
Recommended for California
Which is the hottest month in San Diego?
The hottest time of year in San Diego is normally August. Expect maximum daytime temperatures to reach 27°C with moderate heat and humidity.
Which month has the most rain in San Diego?
In terms of rainfall, January is usually the wettest month in San Diego with 53mm on average. There are normally 6 days in January with some rain.
When is it sunniest in San Diego?
The sunniest time of year in San Diego is normally January with bright sunshine on average for 76% of daylight hours; that's 8 hours of sunshine per day.
When is the sea warmest in San Diego?
The sea is usually at its warmest in San Diego in August when the water temperature reaches 20°C.
Metric (°C / mm) | Imperial (°F / inches)
Discover more about California
Compare San Diego weather with the USA
Below the San Diego weather chart shows average maximum daytime temperature for San Diego, California, USA and the USA (Washington).
Maximum daytime temperature (°C)
San Diego, California, USA
USA (Washington)
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Metric (°C / mm) | Imperial (°F / inches)
Compare more San Diego weather >>
- Save on holidays in summer 2020 with top deals from TUI
- Book holidays to the Greece, Cyprus, Turkey & more
- FREE amends & overseas medical assistance with COVID cover
TUI deal finder
TUI deal finder
Tropical storm risk: San Diego, California hurricane season
% of month affected by tropical storms
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
The San Diego, California tropical storm risk chart above shows the hurricane season. The chart was processed from data supplied by the US Meteorological Agency (NOAA). Find out more about our data sources.
- Save on holidays in summer 2020 with top deals from TUI
- Book holidays to the Greece, Cyprus, Turkey & more
- FREE amends & overseas medical assistance with COVID cover
Where's hot in California right now?
Below are the temperatures expected today at popular destinations in California. Select a destination to compare today's forecast with average weather conditions.
- Death Valley
- Palm Springs
- Napa
- Los Angeles
- Lake Tahoe
- Beverly Hills
- Big Sur
- San Francisco
- Santa Monica
- San Diego
- Santa Barbara
- Yosemite
Be inspired
Get your weekly fix of holiday inspiration from some of the world's best travel writers plus save on your next trip with the latest exclusive offers
We promise not to share your details
Related posts
Popular travel offers
*affiliate links: find out how we are funded and why this helps us remain free to use.