Big Sur weather in September 2026

Expect daytime maximum temperatures of 23°C in Big Sur, California in September based on long-term weather averages. There are 9 hours of sunshine per day on average.

  • 23°C maximum daytime temperature in September in Big Sur23
    23°C max day temperature
  • 9 hours of sunshine per day
  • 2 days with some rainfall in September in Big Sur2
    2 days with some rainfall
  • 9°C minimum night-time temperature in September in Big Sur9
    9°C min night temperature
  • 12 hours of daylight per day in September in Big Sur12
    12 hours of daylight per day
  • No heat & humidity in September in Big Sur0
    No heat & humidity
  • 12 mm monthly rainfall in September in Big Sur12
    12 mm of monthly rainfall
  • UV (maximum) index 7 (High) in September in Big Sur7
    7 (High) UV index
  • 15°C sea temperature in September in Big Sur15
    15°C sea temperature

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The September weather guide for California (Big Sur) 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.

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

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More about California

How hot is it in Big Sur in September?

Daytime temperatures usually reach 28°C in Big Sur in September with moderate heat and humidity, falling to 17°C at night.

How sunny is it in Big Sur in September?

There are normally 9 hours of bright sunshine each day in Big Sur in September - that's 75% of daylight hours.

Does it ever rain in Big Sur in September?

There are usually 2 days with some rain in Big Sur in September and the average monthly rainfall is 9mm.

Big Sur September sunrise & sunset times

Browse the sunrise and sunset times for Big Sur in September 2026. Select a month to view Big Sur sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st September 2026 05:39 18:35
Tuesday, 15th September 2026 05:50 18:14
Wednesday, 30th September 2026 06:02 17:52

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