Mount Isa Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Mount Isa.
Climate overview of Mount Isa
Mount Isa, Queensland, Australia, experiences significant temperature variation throughout the year. Summers bring daytime highs of 38°C (100°F) in December, while winters cool to 26°C (79°F) in June.
The city has a relatively dry climate, receiving around 419 mm (16 in) of rainfall per year. It does experience a distinct dry season from April to November, with very hot summers and warm winters. January is the wettest month and August the driest.
Mount Isa Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Mount Isa - and find the best time to visit.
Monthly Temperature in Mount Isa
Depending on the time of the year, temperatures range from very hot to comfortable in Mount Isa. On average, daytime temperatures range from a very hot 38°C (100°F) in December to a comfortable 26°C (79°F) in June.
Nighttime temperatures range from 25°C (77°F) in December to 10°C (50°F) in June.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Mount Isa
Mount Isa has a relatively dry climate with low precipitation, averaging 419 mm (16 in) of rainfall annually. The seasons in Mount Isa bring significant changes in precipitation. The wettest month, January, receives high rainfall, with an average of 109 mm (4.3 in) of precipitation. This rainfall is distributed across 10 rainy days.
In contrast, the driest month, August, experiences much less rainfall, totaling 2.3 mm (0.1 in) over 2 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Mount Isa Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Mount Isa
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, June, July and August
- Warmest weather: January, November and December
- Wettest months: January, February, March and December, when rainfall is highest.
- Seasonal pattern: A distinct dry season from April to November, with very hot summers and warm winters
Frequently asked questions about the climate in Mount Isa
What is the best time to visit Mount Isa?
May, June, July and August typically offer the most optimal weather in Mount Isa. In contrast, January, February, March, October, November and December tend to have less optimal conditions. Mount Isa has a distinct dry season from April to November, with very hot summers and warm winters.
What temperatures can I expect in Mount Isa?
Daytime highs range from 26°C (79°F) in June to 38°C (100°F) in December. Nighttime lows range from 10°C (50°F) to 25°C (77°F). Temperatures vary considerably through the year.
How much rain does Mount Isa get?
Annual rainfall is around 419 mm (16 in). January is the wettest month with 109 mm (4.3 in), while August is the driest with 2.3 mm (0.1 in).
Mount Isa 3-Day Forecast
Mount Isa on the map
Mount Isa is highlighted - select any city to see its climate.
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