Mount Isa Arpt climate by month
Averages and records for each calendar month at Mount Isa Arpt, Australia, from 1966 to 2026. The warmest month is December, averaging 37.4°C; the coolest is July at 25.0°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 36.6°C | 23.8°C | 45.9°C29 January 1990 | 15.4°C4 January 1970 | 59 / 60 |
| February | 35.5°C | 23.2°C | 43.5°C3 February 2002 | 13.1°C13 February 2012 | 56 / 60 |
| March | 34.5°C | 21.8°C | 43.1°C5 March 2025 | 11.9°C30 March 2026 | 59 / 60 |
| April | 32.1°C | 18.4°C | 38.6°C11 April 2003 | 5.8°C30 April 2017 | 59 / 60 |
| May | 28.0°C | 13.9°C | 37.8°C2 May 2016 | 1.8°C31 May 2011 | 59 / 60 |
| June | 25.1°C | 9.9°C | 34.3°C8 June 2016 | −1.3°C24 June 1981 | 59 / 60 |
| July | 25.0°C | 8.7°C | 35.2°C17 July 1995 | −2.9°C7 July 1984 | 60 / 60 |
| August | 27.6°C | 10.1°C | 37.6°C30 August 2024 | −1.1°C25 August 2000 | 59 / 60 |
| September | 31.6°C | 14.3°C | 40.4°C27 September 2017 | 1.0°C2 September 2001 | 56 / 60 |
| October | 35.0°C | 18.5°C | 42.5°C28 October 2003 | 6.1°C2 October 1982 | 58 / 59 |
| November | 36.7°C | 21.5°C | 43.9°C28 November 2015 | 10.1°C6 November 2025 | 59 / 59 |
| December | 37.4°C | 23.1°C | 45.4°C30 December 2023 | 12.0°C6 December 2017 | 58 / 60 |
Years shows the number behind the average high, then the number holding a record for that month. They differ because a year contributes an average only when the month has at least 25 days of readings, while a single reading is enough to set a record. The average low is withheld on the same 25-day rule and is counted separately again; it is shown as a dash where the archive cannot support it. Across the twelve months here the averages rest on 56 to 60 years each.
See what Mount Isa Arpt is doing right now
Every figure on this page is computed from NOAA GHCN-Daily observations stored per station, per year, per month. Nothing is modelled, interpolated or estimated, and a month the archive never covered is left out rather than filled in. A station appears here only once all twelve months carry an average from at least 10 years. See how this is built.