Perth weather in September 2025

Expect daytime maximum temperatures of 20°C in Perth in September based on long-term weather averages. There are 8 hours of sunshine per day on average with 10 days with some rainfall and typically 71 mm of rainfall in the month.

  • 20°C maximum daytime temperature in September in Perth20
    20°C max day temperature
  • 8 hours of sunshine per day
  • 10 days with some rainfall in September in Perth10
    10 days with some rainfall
  • 10°C minimum night-time temperature in September in Perth10
    10°C min night temperature
  • 12 hours of daylight per day in September in Perth12
    12 hours of daylight per day
  • No heat & humidity in September in Perth0
    No heat & humidity
  • 71 mm monthly rainfall in September in Perth71
    71 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Perth6
    6 (High) UV index
  • 18°C sea temperature in September in Perth18
    18°C sea temperature

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The September weather guide for Western Australia (Perth) 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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How hot is it in Perth in September?

Daytime temperatures usually reach 20°C in Perth in September, falling to 10°C at night.

How sunny is it in Perth in September?

There are normally 8 hours of bright sunshine each day in Perth in September - that's 64% of daylight hours.

How warm is the sea around Perth in September?

The average sea temperature around Perth in September is 18°C.

Does it rain in Perth in September?

There are usually 10 days with some rain in Perth in September and the average monthly rainfall is 71mm.

Perth September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:34 18:00
Monday, 15th September 2025 06:16 18:08
Tuesday, 30th September 2025 05:56 18:18

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