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San Diego weather in September 2023
- 2626°C max day temperature
- 11 day with some rainfall
- 1717°C min night temperature
- 1212 hours of daylight per day
- LLow heat & humidity
- 44 mm of monthly rainfall
- 88 (Very High) UV index
- 2020°C sea temperature
Recommended for California
The September weather guide for California (San Diego) 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.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Metric (°C / mm) | Imperial (°F / inches)
More about California
How hot is it in San Diego in September?
Daytime temperatures usually reach 26°C in San Diego in September with low heat and humidity, falling to 17°C at night.
How sunny is it in San Diego in September?
There are normally 9 hours of bright sunshine each day in San Diego in September - that's 70% of daylight hours.
How warm is the sea around San Diego in September?
The average sea temperature around San Diego in September is 20°C.
Does it ever rain in San Diego in September?
There is usually 1 day with some rain in San Diego in September and the average monthly rainfall is 4mm.
What is the chance of a hurricane in San Diego in September?
On average less than 1 day in September in San Diego is likely to be affected by the passage of one or more tropical storms.
San Diego September sunrise & sunset times
Browse the sunrise and sunset times for San Diego in September 2023. Select a month to view San Diego sunrise and sunset times for the next 12 months.
|Date||Sunrise times||Sunset times|
|Friday, 1st September 2023||06:23||19:13|
|Friday, 15th September 2023||06:32||18:55|
|Saturday, 30th September 2023||06:42||18:35|
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