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San Diego weather in September 2023
- 26°C max day temperature
26 - 9 hours of sunshine per day
- 1 day with some rainfall
1 - 17°C min night temperature
17 - 12 hours of daylight per day
12 - Low heat & humidity
L - 4 mm of monthly rainfall
4 - 8 (Very High) UV index
8 - 20°C sea temperature
20
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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.
JanFebMarAprMayJunJulAugSepOctNovDec
| 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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