Mount Isa weather in December 2025

Q: How hot is it in Mount Isa in December?

Daytime temperatures usually reach 29°C in Mount Isa in December with moderate heat and humidity, falling to 20°C at night.

Q: How sunny is it in Mount Isa in December?

There are normally 9 hours of bright sunshine each day in Mount Isa in December - that's 61% of daylight hours.

Q: How warm is the sea around Mount Isa in December?

The average sea temperature around Mount Isa in December is 25°C.

Q: Does it rain in Mount Isa in December?

There are usually 12 days with some rain in Mount Isa in December and the average monthly rainfall is 130mm.

Q: What is the chance of a cyclone in Mount Isa in December?

On average less than 1 day in December in Mount Isa is likely to be affected by the passage of one or more tropical storms.

Expect daytime maximum temperatures of 37°C in Mount Isa, Queensland in December and very high heat and humidity based on long-term weather averages. There are 10 hours of sunshine per day on average with typically 60 mm of rainfall in the month.

37
37°C max day temperature
10
10 hours of sunshine per day
7
7 days with some rainfall
22
22°C min night temperature
13
13 hours of daylight per day
VH
Very High heat & humidity
60
60 mm of monthly rainfall
11
11+ (Extreme) UV index

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The December weather guide for Queensland (Mount Isa) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm) | Imperial (°F / inches)

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How hot is it in Mount Isa in December?

Daytime temperatures usually reach 29°C in Mount Isa in December with moderate heat and humidity, falling to 20°C at night.

How sunny is it in Mount Isa in December?

There are normally 9 hours of bright sunshine each day in Mount Isa in December - that's 61% of daylight hours.

How warm is the sea around Mount Isa in December?

The average sea temperature around Mount Isa in December is 25°C.

Does it rain in Mount Isa in December?

There are usually 12 days with some rain in Mount Isa in December and the average monthly rainfall is 130mm.

What is the chance of a cyclone in Mount Isa in December?

On average less than 1 day in December in Mount Isa is likely to be affected by the passage of one or more tropical storms.

Mount Isa December sunrise & sunset times

Browse the sunrise and sunset times for Mount Isa in December 2025. Select a month to view Mount Isa sunrise and sunset times for the next 12 months.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Date	Sunrise times	Sunset times
Monday, 1st December 2025	05:52	19:10
Tuesday, 16th December 2025	05:56	19:19
Wednesday, 31st December 2025	06:04	19:26

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Queensland - quick facts
Flight time^✝	22 hours
Time difference	UK +10 hours
Language(s)	English
Currency	Australian Dollar
Electricity	I plug (230V)
Driving side	Left
Visa^✝	Yes
Why visit?	Beaches Nature Nightlife
Tourist info	Tourism & Events Queensland