Mount Isa Weather in May
What's the weather like in Mount Isa (Queensland) in May 2026?
The climate in Mount Isa during May can be summarized as warm and dry.
May is in the fall / autumn in Mount Isa and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a comfortable 27°C (81°F), whilst at night 14°C (56°F) is normal.
| Daytime temperature | 27.1°C 80.8°F |
|---|---|
| Nightly temperature | 13.5°C 56.3°F |
| Average temperature | 20.3°C 68.5°F |
| Daily sunshine | 9.9 hrs |
| Avg rainfall | 18 mm 0.7 ins |
| Rainy days | 2 days |
| Sea temperature | 25.1°C 77.2°F |
| Humidity | 40% |
| Windspeed | 12.6kph 8 mph |
On average May is the 6th driest month of the year in Mount Isa with around 18mm 0.7 inches of rain making it a dry time to visit. This rainfall is typically spread over 2 days, although this may vary considerably.
On the flip side this corresponds to an average of 9.9 hours of sunshine per day.
May temperatures in Mount Isa
May rainfall
May hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Mount Isa in May 2025.
Other monthly averages
Mount Isa weather stats
| Hottest month: | January | 35.9°C 96.6°F |
|---|---|---|
| Driest month: | August | 7mm 0.3ins |
| Sunniest month: | August | 10.8hrs |
| Coldest month: | July | 23.4°C 74.1°F |
| Wettest month: | January | 97mm 3.8ins |
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