What’s the Mount Isa weather really like?

Even if you’re not a local, most Australians would know that Mount Isa is a warm place to live all-year round in Australia. Mt Isa weather can be a blessing or a curse, depending on the time of year and what you’re doing. Read on to find out everything you need to know.

Mount Isa summer

There’s no getting around it, Mt Isa summers can get very hot. Summer days can be hot and windy with 40 degrees temperatures not uncommon.

According to the most recent Bureau of Meteorology (BOM) statistics, December averages 7.5 days per month over 40 degrees, while January averages 5.6. February is a bit kinder, with just 2.7 (though there are 3 less days in February).

The average maximum temperature in the summer months is 37.4 degrees in December, 36.6 in February and 35.6 in February.

Autumn and spring are also comparatively warm months in Mount Isa with the following average maximum temperatures:
March 34.5, April 31.1, May 28.0
September 31.5, October 34.9, November 36.6.

How to beat the Mount Isa heat

Air con is pretty much a ‘must have’ for most Mount Isa homes and businesses. You can read more about air conditioning systems here, including the pros and cons of split versus ducted systems.

There’s also great community facilities to help you beat the Mount Isa heat like Splashez Aquatic Centre and Lake Moondarra where you can enjoy a range of water sport activities. Both places are very popular with locals all-year round.

Splashez has both a 50 metre pool and a children’s leisure pool with water features. Lake Moondarra is a great spot for swimming, boating, water skiing, fishing, sailing, canoeing and kayaking.

What’s the Mount Isa winter weather like?

One of the benefits of Mount Isa’s warm climate is that we really don’t get a winter during the day, though it can get cool at night. The average minimum and maximum Mt Isa winter temperatures are outlined below:

  • June 10 to 25 degrees
  • July 8.7 to 24.9
  • August 10.2 to 27.5.

There is also minimal rainfall during the winter months and cloudless blue skies are common. August is the driest month on record, with an average of just 26.6 mm of rain falling each year.


When is the Mount Isa wet season?
The Mt Isa wet season is in the summer months, especially in January and February. More than two times the amount of rain falls in Mount Isa during the 3 summer months than in the 9 other months combined. Summer storms are also common.

What is the most amount of rainfall in Mount Isa in a single day?
213 mm of rain fell in 24 hours in January 2004. This caused some serious flooding with roads cut (including the Barkly Highway). Many Mount Isa residents were isolated for several days with air lifts of food and other supplies being required from the State Emergency Service (SES).

What is the hottest Mount Isa temperature ever recorded?
The hottest Mt Isa temperature ever recorded was 45.9 degrees in January 1990.

What is the coldest Mount Isa temperature ever recorded?
The coldest Mt Isa temperature ever recorded was -2.9 degrees in July 1984.

About Us


Jays Real Estate has been Mount Isa’s premier residential and commercial real estate agency since 1981.

If you’re thinking about selling, buying, leasing or renting any Mt Isa property, or you need your property professionally managed, then contact our team today for an obligation-free chat!

We’d be happy to provide you with advice and to answer any property questions you have.