Mount Gambier weather in September 2026

Expect daytime maximum temperatures of 15°C in Mount Gambier, South Australia in September based on long-term weather averages. There are 5 hours of sunshine per day on average with 10 days with some rainfall and typically 74 mm of rainfall in the month.

  • 15°C maximum daytime temperature in September in Mount Gambier15
    15°C max day temperature
  • 5 hours of sunshine per day
  • 10 days with some rainfall in September in Mount Gambier10
    10 days with some rainfall
  • 7°C minimum night-time temperature in September in Mount Gambier7
    7°C min night temperature
  • 12 hours of daylight per day in September in Mount Gambier12
    12 hours of daylight per day
  • No heat & humidity in September in Mount Gambier0
    No heat & humidity
  • 74 mm monthly rainfall in September in Mount Gambier74
    74 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Mount Gambier5
    5 (Moderate) UV index

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The September weather guide for South Australia (Mount Gambier) 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 Mount Gambier in September?

Daytime temperatures usually reach 18°C in Mount Gambier in September, falling to 9°C at night.

How sunny is it in Mount Gambier in September?

There are normally 7 hours of bright sunshine each day in Mount Gambier in September - that's 59% of daylight hours.

How warm is the sea around Mount Gambier in September?

The average sea temperature around Mount Gambier in September is 14°C.

Does it rain in Mount Gambier in September?

There are usually 8 days with some rain in Mount Gambier in September and the average monthly rainfall is 53mm.

Mount Gambier September sunrise & sunset times

Browse the sunrise and sunset times for Mount Gambier in September 2026. Select a month to view Mount Gambier sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st September 2026 06:29 17:45
Tuesday, 15th September 2026 06:08 17:57
Wednesday, 30th September 2026 05:45 18:10

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