Best time to visit Mount Isa

Mount Isa is a city of two halves. June scores 98 and December scores 30 — a 68-point swing, which is the difference between a holiday and an endurance test. The month you pick matters more here than almost anywhere. The good window runs May to August — 4 months within ten points of the best.

December is the warmest month at 38.3 °C and June the coolest at 25.8 °C — a 12.5 °C spread across the year. 247 days a year top 30 °C, more than a third of the calendar, so heat is the baseline here rather than a season.

There is a real wet season here. January, February and December carry the rain — up to 13 wet days in a month — while April to October drop as low as 1. That 12-day gap is the biggest single difference between a good month and a bad one in Mount Isa, and it moves further than the temperature does.

Daylight runs from 10.9 hours in winter to 13.4 in summer, enough to notice on a sightseeing itinerary.

The three strongest months are June, July, August. The one to think twice about is December. Each month below has its own page with rainfall reliability, extremes, daylight and crowd levels.

Mount Isa month by month