Mount Isa
September
Weather in Mount Isa for September 2025
Your guide to Mount Isa weather in September - trends and predictions
In general, the average temperature in Mount Isa at the beginning of September is 31.3 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 32 °C by the end of September.
Precipitation in Mount Isa during September is a rare event, with an average of fewer than 2 rainy days.
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30
Dry days
0
Rainy days
0
Snow days
31°/18°
Temperatures
29 km/h
Avg max wind
23 %
Avg humidity
Mount Isa in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  31° | 2 32° | 3 31° | 4 31° | 5 31° | 6 31° | 7 32° |
| 8 30° | 9 31° | 10 31° | 11 30° | 12 30° | 13 28° | 14 29° |
| 15 30° | 16 30° | 17 29° | 18 27° | 19 31° | 20 33° | 21 34° |
| 22 33° | 23 33° | 24  32° | 25 33° | 26 30° | 27 31° | 28 32° |
| 29 33° | 30 33° |
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Temperatures trend during September in Mount Isa
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Sunny | 31° /17° | 0 mm | 9 | |
| 2 Sept. | Sunny | 32° /18° | 0 mm | 9 | |
| 3 Sept. | Sunny | 31° /18° | 0 mm | 9 | |
| 4 Sept. | Sunny | 31° /17° | 0 mm | 9 | |
| 5 Sept. | Sunny | 31° /17° | 0 mm | 9 | |
| 6 Sept. | Sunny | 31° /19° | 0 mm | 9 | |
| 7 Sept. | Sunny | 32° /19° | 0 mm | 9 | |
| 8 Sept. | Sunny | 30° /18° | 0 mm | 9 | |
| 9 Sept. | Sunny | 31° /17° | 0 mm | 9 | |
| 10 Sept. | Sunny | 31° /17° | 0 mm | 9 | |
| 11 Sept. | Sunny | 30° /18° | 0 mm | 9 | |
| 12 Sept. | Sunny | 30° /18° | 0 mm | 9 | |
| 13 Sept. | Sunny | 28° /16° | 0 mm | 8 | |
| 14 Sept. | Sunny | 29° /16° | 0 mm | 9 | |
| 15 Sept. | Sunny | 30° /18° | 0 mm | 9 | |
| 16 Sept. | Sunny | 30° /18° | 0 mm | 9 | |
| 17 Sept. | Sunny | 29° /18° | 0 mm | 8 | |
| 18 Sept. | Sunny | 27° /19° | 0.3 mm | 8 | |
| 19 Sept. | Sunny | 31° /19° | 0 mm | 9 | |
| 20 Sept. | Sunny | 33° /20° | 0 mm | 9 | |
| 21 Sept. | Sunny | 34° /20° | 0 mm | 10 | |
| 22 Sept. | Sunny | 33° /19° | 0 mm | 9 | |
| 23 Sept. | Sunny | 33° /19° | 0 mm | 9 | |
| 24 Sept. | Partly cloudy | 32° /22° | 0 mm | 9 | |
| 25 Sept. | Sunny | 33° /20° | 0 mm | 9 | |
| 26 Sept. | Sunny | 30° /21° | 1.1 mm | 8 | |
| 27 Sept. | Sunny | 31° /19° | 0 mm | 9 | |
| 28 Sept. | Sunny | 32° /18° | 0 mm | 9 | |
| 29 Sept. | Sunny | 33° /20° | 0 mm | 9 | |
| 30 Sept. | Sunny | 33° /20° | 0 mm | 9 | |
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Important Notice
Our weather forecast for Mount Isa in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Mount Isa forecast closer to your planned date for the most up-to-date weather information.
Mount Isa in September - FAQ
What are the expected maximum and minimum temperatures in Mount Isa during September?
Expect warm days with temperatures around 31°, cooling to mild conditions of 18° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in Mount Isa during September?
Rainfall in Mount Isa during September is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 0 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in Mount Isa during September?
The average wind speed in Mount Isa during September is 29 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Mount Isa
Explore the daily rainfall trends and prepare for Mount Isas September weather 💧
UV exposure in Mount Isa during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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