Crescent City weather in September 2025

Expect daytime maximum temperatures of 21°C in Crescent City, California in September based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 47 mm of rainfall in the month.

  • 21°C maximum daytime temperature in September in Crescent City21
    21°C max day temperature
  • 8 hours of sunshine per day
  • 5 days with some rainfall in September in Crescent City5
    5 days with some rainfall
  • 10°C minimum night-time temperature in September in Crescent City10
    10°C min night temperature
  • 12 hours of daylight per day in September in Crescent City12
    12 hours of daylight per day
  • No heat & humidity in September in Crescent City0
    No heat & humidity
  • 47 mm monthly rainfall in September in Crescent City47
    47 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Crescent City6
    6 (High) UV index
  • 12°C sea temperature in September in Crescent City12
    12°C sea temperature

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The September weather guide for California (Crescent City) 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 Crescent City in September?

Daytime temperatures usually reach 21°C in Crescent City in September, falling to 10°C at night.

How sunny is it in Crescent City in September?

There are normally 8 hours of bright sunshine each day in Crescent City in September - that's 67% of daylight hours.

How warm is the sea around Crescent City in September?

The average sea temperature around Crescent City in September is 12°C.

Does it rain in Crescent City in September?

There are usually 5 days with some rain in Crescent City in September and the average monthly rainfall is 47mm.

Crescent City September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:43 18:49
Monday, 15th September 2025 05:57 18:25
Tuesday, 30th September 2025 06:13 17:59

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