Big Sur weather in September 2025

Expect daytime maximum temperatures of 73°F in Big Sur, California in September based on long-term weather averages. There are 9 hours of sunshine per day on average.

  • 73°F maximum daytime temperature in September in Big Sur73
    73°F max day temperature
  • 9 hours of sunshine per day
  • 2 days with some rainfall in September in Big Sur2
    2 days with some rainfall
  • 48°F minimum night-time temperature in September in Big Sur48
    48°F 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
  • 0.5 inches monthly rainfall in September in Big Sur0.5
    0.5 inches of monthly rainfall
  • UV (maximum) index 7 (High) in September in Big Sur7
    7 (High) UV index
  • 59°F sea temperature in September in Big Sur59
    59°F 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)  |  Imperial (°F)

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More about California

How hot is it in Big Sur in September?

Daytime temperatures usually reach 73°F in Big Sur in September, falling to 48°F 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 74% of daylight hours.

How warm is the sea around Big Sur in September?

The average sea temperature around Big Sur in September is 59°F.

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 0.5 inches.

Big Sur September sunrise & sunset times

Browse the sunrise and sunset times for Big Sur in September 2025. Select a month to view Big Sur sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:39 18:34
Monday, 15th September 2025 05:50 18:14
Tuesday, 30th September 2025 06:02 17:52

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