Big Sur weather in September 2025

Expect 23°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Big Sur in September based on long-term weather averages. There is usually 2 days with some rainfall and 12 mm of average monthly rainfall in September.

  • 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

More about Big Sur

Big Sur by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for California

Wowcher: up to 80% off travel & shopping products

  • Save up to 80% with latest deals & discounts online
  • Book short breaks, UK staycations, beach holidays & more
  • Plus buy electronics, garden products & beauty treatments
Go to Wowcher deal >>

View all Wowcher offers

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)

Back to top

More about California

How hot is it in Big Sur in September?

Daytime temperatures usually reach 23°C in Big Sur in September, falling to 9°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 74% of daylight hours.

How warm is the sea around Big Sur in September?

The average sea temperature around Big Sur in September is 15°C.

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 12mm.

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

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^