What is the best time to visit Mount Isa?

Based on our Comfort Score analysis, June is the best month to visit Mount Isa, Queensland, scoring 10.0 out of 10 for pleasant weather conditions.

What is the Comfort Score for Mount Isa?

Mount Isa has an annual Comfort Score of 5.3/10, based on temperature, humidity, rainfall, UV exposure, and sunshine hours throughout the year.

What is the hottest month in Mount Isa?

December is the hottest month in Mount Isa with average daily highs reaching 37.7 degrees Celsius. The city records about 93 days above 35 degrees per year.

Mount Isa Weather and Climate

Queensland, Australia (20.73°S, 139.49°E, 344m elevation) Hot semi-arid (BSh)

5.3/10

Variable comfort year-round

Best month: June (10.0/10). Ranked #177 of 213 Australian cities. The RefDat Comfort Score weighs temperature, humidity, rainfall, and sunshine into a single 1-to-10 rating for how pleasant a climate actually feels.

How the score works →

Climate Dashboard

Comfort, seasonality and national benchmarks in one view.

Monthly Comfort Score

June is the sweet spot

June: 10.0/10. December: 1.0/10. Annual score 5.3/10, ranked #177 of 213 Australian cities.

Against national averages

Annual benchmarks

Temperature range

19.9 - 31.3°C

Days 7.5 degrees warmer; nights 5.6 degrees warmer

Annual rainfall

551mm

37% below national avg; national avg 876mm

Rain days

64 days/yr

41 fewer rain days than national avg

Solar exposure

21.4 MJ/m²

3.1 MJ/m² above national avg

Humidity

30%

18 points below national avg

Seasonal pattern

Four-season readout

Summer2.6/10

24.4 - 34.4°C

324mm rain

Autumn6.5/10

19.5 - 30.0°C

122mm rain

Winter9.2/10

13.1 - 25.8°C

19mm rain

Spring3.1/10

22.6 - 34.9°C

86mm rain

Temperature

December has the warmest afternoons at 37.7 degrees. July has the coolest nights at 11.2 degrees.

Rainfall

551mm falls across 64 rain days. January is wettest (176mm), August driest (0mm), so rainfall is relatively even month to month.

Comfort window

June scores 10.0/10 and is the best month for pleasant weather. December is the hardest month at 1.0/10.

Planning cue

Use the comfort chart first if you are timing a visit. Use the benchmark bars when you want to compare Mount Isa with the national climate baseline.

Monthly Climate Averages

Month	Max °C	Min °C	Rain mm	Rain Days	Solar MJ	Humidity %	Comfort

Weather by Month

Detailed climate data, packing advice, and what to expect for each month in Mount Isa.

January2.1/10Challenging34.3°C max, 176mm rain February4.6/10Variable31.2°C max, 132mm rain March4.5/10Variable31.9°C max, 113mm rain April7.1/10Good30.0°C max, 1mm rain May7.9/10Excellent28.1°C max, 8mm rain June10.0/10Excellent24.6°C max, 4mm rain July10.0/10Excellent23.3°C max, 15mm rain August7.5/10Excellent29.5°C max, 0mm rain September5.9/10Variable32.0°C max, 0mm rain October2.1/10Challenging36.3°C max, 11mm rain November1.2/10Challenging36.4°C max, 75mm rain December1.0/10Challenging37.7°C max, 16mm rain

Compare and Explore

Mount Isa vs Sydney Mount Isa vs Melbourne Mount Isa vs Brisbane Mount Isa vs Perth Best Time to Visit Climate Trends Australian winter weather

Similar Climates

If you like Mount Isa's climate, you might also consider:

Hobart
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Northern Territory - Comfort 5.3/10 Tom Price
Western Australia - Comfort 5.2/10