Hamilton Island climate by month
Averages and records for each calendar month at Hamilton Island, Australia, from 2002 to 2026. The warmest month is January, averaging 29.9°C; the coolest is July at 21.5°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 29.9°C | 24.9°C | 34.5°C19 January 2015 | 21.0°C23 January 2015 | 24 / 24 |
| February | 29.6°C | 24.8°C | 35.6°C13 February 2019 | 20.5°C21 February 2018 | 22 / 24 |
| March | 28.8°C | 24.4°C | 33.6°C27 March 2017 | 19.1°C30 March 2004 | 21 / 25 |
| April | 27.0°C | 22.9°C | 31.3°C7 April 2015 | 18.4°C20 April 2008 | 23 / 25 |
| May | 24.3°C | 20.6°C | 29.0°C4 May 2016 | 13.9°C24 May 2020 | 24 / 25 |
| June | 22.3°C | 18.9°C | 28.4°C24 June 2016 | 13.3°C11 June 2011 | 24 / 25 |
| July | 21.5°C | 18.0°C | 26.8°C15 July 2005 | 12.1°C6 July 2022 | 25 / 25 |
| August | 22.9°C | 18.5°C | 28.4°C18 August 2024 | 13.4°C2 August 2025 | 24 / 25 |
| September | 25.3°C | 20.2°C | 31.7°C21 September 2024 | 15.1°C12 September 2011 | 24 / 25 |
| October | 27.4°C | 22.1°C | 32.8°C31 October 2025 | 18.0°C24 October 2016 | 23 / 24 |
| November | 28.8°C | 23.5°C | 34.2°C28 November 2018 | 19.4°C10 November 2009 | 23 / 24 |
| December | 29.9°C | 24.7°C | 35.6°C18 December 2005 | 19.2°C28 December 2011 | 23 / 24 |
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 21 to 25 years each.
See what Hamilton Island 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.