Long Beach weather in September 2025

Expect 27°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Long Beach in September. Check more long-term weather averages for Long Beach in September before you book your next holiday to California in 2025/2026.

  • 27°C maximum daytime temperature in September in Long Beach27
    27°C max day temperature
  • 9 hours of sunshine per day
  • 2 days with some rainfall in September in Long Beach2
    2 days with some rainfall
  • 16°C minimum night-time temperature in September in Long Beach16
    16°C min night temperature
  • 12 hours of daylight per day in September in Long Beach12
    12 hours of daylight per day
  • Low heat & humidity in September in Long BeachL
    Low heat & humidity
  • 4 mm monthly rainfall in September in Long Beach4
    4 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in September in Long Beach8
    8 (Very High) UV index
  • 20°C sea temperature in September in Long Beach20
    20°C sea temperature

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The September weather guide for California (Long Beach) 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 Long Beach in September?

Daytime temperatures usually reach 27°C in Long Beach in September with low heat and humidity, falling to 16°C at night.

How sunny is it in Long Beach in September?

There are normally 9 hours of bright sunshine each day in Long Beach in September - that's 74% of daylight hours.

How warm is the sea around Long Beach in September?

The average sea temperature around Long Beach in September is 20°C.

Does it ever rain in Long Beach in September?

There are usually 2 days with some rain in Long Beach in September and the average monthly rainfall is 4mm.

Long Beach September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:27 18:18
Monday, 15th September 2025 05:36 17:59
Tuesday, 30th September 2025 05:47 17:38

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