Mount Isa Average Temperature by Month

This page shows the average temperature in each month of the year in Mount Isa, Queensland. It is based on NOAA data for the years 1991–2020.
What's the Hottest Month in Mount Isa?
In Mount Isa, Queensland, the warmest month is January, with an average daily high temperature of 36.5 °C and an average low of 23.6 °C.
What's the Coldest Month in Mount Isa?
In Mount Isa, Queensland, the coolest month is July, with an average daily high temperature of 25.5 °C and an average low of 8.6 °C.
Month Avg. High Avg. Low
January 36.5 °C 23.6 °C
February 35.7 °C 23.1 °C
March 34.7 °C 21.6 °C
April 32.5 °C 18.4 °C
May 28.2 °C 13.5 °C
June 25.3 °C 9.9 °C
July 25.5 °C 8.6 °C
August 27.8 °C 9.8 °C
September 32.3 °C 14.1 °C
October 35.3 °C 18.4 °C
November 37.0 °C 21.4 °C
December 37.4 °C 23.2 °C
Year 32.3 °C 17.1 °C
Weather Station Details
Years Station Coordinates
1971–2023 Mount Isa Aero location
1926–1970 Mount Isa Post Office location