Mount Isa weather by month & the best time to visit
🇦🇺 Australia · small town · semi-arid climate
The best time to visit Mount Isa is May — its sunniest month (Sunshine Score 99/100), with July and August close behind. Mount Isa averages about 3,655 hours of sunshine a year. Daytime highs around 28°C / 82°F and roughly 8 mm of rain in May.
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- Sun hours / year
- 3,655
- Sunniest month
- May
- Peak score
- 99/100
- Rain / year
- 471 mm
- Midday UV at peak
- 13 (extreme)
- Population
- 18k
- Elevation
- 337 m
When is the best time to visit Mount Isa?
For sunshine, the best time to visit Mount Isa is May, then July and August. The dullest month is December (35/100, 70 mm of rain). The full month-by-month picture is in the table below.
How sunny is Mount Isa?
Mount Isa is one of the sunniest places on Earth: about 3,655 hours of sunshine a year. 64 Sunshine Score points separate May (99) from December (35), so the month you pick matters. It ranks #20 of 118 destinations in Australia for annual sunshine, above the national median of 3,071 hours. Rain is strongly seasonal here: roughly 67% of the year's 471 mm falls in the three months around January.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV |
|---|---|---|---|---|---|
| January | 44 | 36° / 97°F | 24° / 75°F | 144 mm | 13 |
| February | 57 | 35° / 95°F | 23° / 73°F | 100 mm | 13 |
| March | 62 | 35° / 95°F | 21° / 70°F | 60 mm | 12 |
| April | 88 | 33° / 91°F | 19° / 66°F | 15 mm | 10 |
| May | 99 | 28° / 82°F | 14° / 57°F | 8 mm | 7 |
| June | 98 | 25° / 77°F | 10° / 50°F | 12 mm | 6 |
| July | 99 | 25° / 77°F | 10° / 50°F | 3 mm | 6 |
| August | 99 | 28° / 82°F | 11° / 52°F | 3 mm | 8 |
| September | 89 | 33° / 91°F | 16° / 61°F | 5 mm | 10 |
| October | 49 | 37° / 99°F | 20° / 68°F | 13 mm | 12 |
| November | 37 | 38° / 100°F | 23° / 73°F | 38 mm | 12 |
| December | 35 | 38° / 100°F | 25° / 77°F | 70 mm | 12 |
See Mount Isa on the interactive sunshine globe →
Nearby places for sunshine
- Alice Springs Australia · 672 km · best in Aug · 3,770 h sun/yr
- Townsville Australia · 777 km · best in Sep · 3,126 h sun/yr
- Cairns Australia · 782 km · best in Aug · 2,763 h sun/yr
- Proserpine Australia · 944 km · best in Sep · 3,060 h sun/yr
- Hamilton Island Australia · 986 km · best in Sep · 3,060 h sun/yr
- Mackay Australia · 1,008 km · best in Aug · 3,009 h sun/yr
Nearest destinations
- Cloncurry Australia · 106 km · 3,752 h sun/yr · best in Jul
- Normanton Australia · 371 km · 3,494 h sun/yr · best in Aug
- Bedourie Australia · 409 km · 3,852 h sun/yr · best in Apr
- Hughenden Australia · 493 km · 3,647 h sun/yr · best in Aug
- Tennant Creek Australia · 566 km · 3,679 h sun/yr · best in Jun
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