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

Is San Diego a good destination in September, weather-wise? Check out this detailed guide to the month’s weather conditions.

Temperatures

The weather in San Diego during September is typically perfect, with high temperatures and almost no rainfall. During the day, temperatures usually reach up to 26°C. At night, they tend to fall to approximately 18°C. With its warm temperatures, this month stands out as the hottest. Be sure to pack appropriately and embrace the summer vibes.

Precipitation

San Diego in September usually receives almost no rainfall, averaging around 4.3 mm for the month. Expect around a single day of rain based on historical data.

Average sunshine

Enjoy a sunny month with about 253 hours of sunshine, providing a cheerful and lively atmosphere.

If you're inclined towards comfortable temperatures and drier conditions, September is a prime time to visit San Diego. January, February, March, April, May, June, July, August, September, October and November typically offer 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 September

Min Temperature 18°C  

Max Temperature 26°C  

Chance of Rain 3%  

Precipitation 4.3 mm  

Rainy days a single day  

Humidity 74%  

Sunshine 253 hours  

Percentage Sunshine 68%  

Where to go in the United States of America in September

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?

It's going to be warm! Consider airy clothing, t-shirts, and other summer clothes. Shorts for men made of cotton or linen are good options for staying cool.

What To Do

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

Swimming

10/10

Cycling

8/10

Walking

8/10

Barbeque

10/10

Camping

10/10

Outdoor sports

8/10

Interested in more climate information?

This site 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 travel conditions. Find out where to go with our weather planner.