Mount Isa weather in September 2025

Expect 30°C daytime maximum temperatures in the shade with on average 10 hours of sunshine per day in Mount Isa in September based on long-term weather averages. There is usually 2 days with some rainfall and 13 mm of average monthly rainfall in September.

  • 30°C maximum daytime temperature in September in Mount Isa30
    30°C max day temperature
  • 10 hours of sunshine per day
  • 2 days with some rainfall in September in Mount Isa2
    2 days with some rainfall
  • 14°C minimum night-time temperature in September in Mount Isa14
    14°C min night temperature
  • 12 hours of daylight per day in September in Mount Isa12
    12 hours of daylight per day
  • Moderate heat & humidity in September in Mount IsaM
    Moderate heat & humidity
  • 13 mm monthly rainfall in September in Mount Isa13
    13 mm of monthly rainfall
  • UV (maximum) index 10 (Very High) in September in Mount Isa10
    10 (Very High) UV index

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The September weather guide for Queensland (Mount Isa) 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 Isa in September?

Daytime temperatures usually reach 30°C in Mount Isa in September with moderate heat and humidity, falling to 14°C at night.

How sunny is it in Mount Isa in September?

There are normally 10 hours of bright sunshine each day in Mount Isa in September - that's 83% of daylight hours.

Does it ever rain in Mount Isa in September?

There are usually 2 days with some rain in Mount Isa in September and the average monthly rainfall is 13mm.

Mount Isa September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:51 18:33
Monday, 15th September 2025 06:39 18:36
Tuesday, 30th September 2025 06:24 18:40

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