Climate almanac
Mount Isa
Queensland, Australia · -20.73°, 139.50°
What is the climate like in Mount Isa?
The best time to visit Mount Isa is typically April – November, with trip comfort peaking in August (9.2/10). Mount Isa is warmest in December, when daily highs average 99°F (37°C), and coolest in July, when lows fall to about 51°F (11°C). The wettest month is typically March and the driest is August; the year sees roughly 18 in (446 mm) of precipitation.
- Best time to visitApril – November — comfort peaks in August (9.2/10)
- Warmest monthDecember — average high 99°F (37°C)
- Coolest monthJuly — average low 51°F (11°C)
- Wettest monthMarch (4.2 in (107 mm))
- Driest monthAugust (0.1 in (3 mm))
- Annual precipitation18 in (446 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
- Records fromMount Isa Mine, 2 km away (1965-2025)