Perth/Jandakot Arpt climate by month
Averages and records for each calendar month at Perth/Jandakot Arpt, Australia, from 1989 to 2026. The warmest month is February, averaging 31.7°C; the coolest is July at 18.1°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 31.6°C | 17.0°C | 45.7°C31 January 1991 | 4.7°C25 January 2001 | 36 / 36 |
| February | 31.7°C | 17.3°C | 46.6°C23 February 1991 | 6.5°C3 February 2003 | 37 / 37 |
| March | 29.7°C | 15.8°C | 43.0°C10 March 2003 | 1.6°C28 March 2007 | 36 / 36 |
| April | 25.8°C | 12.6°C | 39.2°C11 April 2020 | 2.3°C29 April 2000 | 36 / 36 |
| May | 22.2°C | 9.4°C | 33.4°C1 May 2002 | −0.6°C25 May 2012 | 36 / 36 |
| June | 19.1°C | 7.6°C | 25.6°C1 June 2019 | −3.4°C17 June 2006 | 36 / 36 |
| July | 18.1°C | 7.2°C | 25.9°C21 July 1994 | −2.8°C27 July 1998 | 37 / 37 |
| August | 18.8°C | 7.4°C | 29.4°C28 August 2019 | −1.4°C21 August 2000 | 37 / 37 |
| September | 20.3°C | 8.4°C | 34.2°C20 September 2014 | −1.3°C22 September 2008 | 36 / 37 |
| October | 23.0°C | 9.9°C | 37.4°C17 October 2009 | −1.0°C6 October 1994 | 36 / 36 |
| November | 26.5°C | 12.8°C | 40.3°C9 November 2019 | 0.8°C18 November 2004 | 36 / 36 |
| December | 29.5°C | 15.1°C | 44.0°C26 December 2007 | 3.2°C2 December 2002 | 36 / 36 |
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 36 to 37 years each.
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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.