When to go · Mount Isa
Mount Isa in December
Avoid month. Listed as a month to avoid: Dec–Feb (wet season: highs near 37°C (99°F), humidity, flooded roads).Avoid month. Listed as a month to avoid: Dec–Feb (wet season: highs near 99°F (37°C), humidity, flooded roads).
Key facts
- Verdict
- Avoid
- Temperature
- 37°C (99°F)99°F (37°C) / 23°C (73°F)73°F (23°C)
- average high / low
- Rain days
- 7
- Crowds
- High
- Australia overall
- Prices
- High
- Australia overall
Verdict
Listed as a month to avoid: Dec–Feb (wet season: highs near 37°C (99°F), humidity, flooded roads).Listed as a month to avoid: Dec–Feb (wet season: highs near 99°F (37°C), humidity, flooded roads).
Is another month better than December?
December is rated avoid. These months rate higher:
- MayGreatInside Mount Isa's best window: May–Sep (dry, cool nights, highs in the mid-20s to low 30s).
- JuneGreatInside Mount Isa's best window: May–Sep (dry, cool nights, highs in the mid-20s to low 30s).
- JulyGreatInside Mount Isa's best window: May–Sep (dry, cool nights, highs in the mid-20s to low 30s).
- AugustGreatInside Mount Isa's best window: May–Sep (dry, cool nights, highs in the mid-20s to low 30s).
Weather in December
- Mount IsaHighs around 37 °C (99 °F), lows around 23 °C (73 °F), rain on about 7 daysHighs around 99 °F (37 °C), lows around 73 °F (23 °C), rain on about 7 days
Festivals and holidays
Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.
New Year big impact
31 Dec – 1 Jan · Australia
Sydney Harbour fireworks: vantage points ticketed or claimed from morning; beds book out months ahead.
Summer school holidays big impact
Mid-Dec to late Jan · Australia
Coast, campsites, ferries and Tasmania fill; prices peak.
Christmas and Boxing Day big impact
25–26 December · Australia
Shops closed on Christmas Day; Boxing Day Test in Melbourne and the Sydney–Hobart yacht race start.
Crowds and prices
- Crowds · Australia overall
- High
- Prices · Australia overall
- High
Australia overall: Summer holidays begin; bushfire risk and heatwaves in the south, wet season in the north; book everything early.
High-price month: see what to book ahead.
Compare two months
Weather, crowds and prices for any two months in Mount Isa, side by side.
Verdict
Dec: Avoid
May: Great (better)
Daytime high
Dec: 37 °C (99 °F)99 °F (37 °C)
May: 28 °C (82 °F)82 °F (28 °C)
Night low
Dec: 23 °C (73 °F)73 °F (23 °C)
May: 14 °C (57 °F)57 °F (14 °C)
Rain days
Dec: 7
May: 2 (better)
Crowds
Dec: High
May: Low
Prices
Dec: High
May: Medium
Festivals listed
Dec: 3
May: 0
December: Listed as a month to avoid: Dec–Feb (wet season: highs near 37°C, humidity, flooded roads).
May: Inside Mount Isa's best window: May–Sep (dry, cool nights, highs in the mid-20s to low 30s).
Mount Isa: figures are long-term averages from this guide, not a forecast.
What to pack
- Light, breathable clothes, a sun hat and sunscreen