October is one of the cooler months of the year in Perth, with average highs near 19.9°C and lows around 14.4°C (mean 17.2°C). It is one of the drier months, averaging 35 mm of rainfall and 73% relative humidity across the period.
October is one of the cooler months of the year in Perth. Across 45 years of records, the warmest October in Perth was 2015 — when the month averaged 19.1°C — while the coldest was 1993 at 15.3°C. Typical October days reach 19.9°C with nights near 14.4°C. The long-term trend is warming, about 0.2°C per decade.
October is one of the drier months in Perth, averaging 35 mm of rainfall. The wettest October on record was 1999 with 92 mm, while the driest was 2000 at 7 mm.
Relative humidity in Perth during October averages 73%. The most humid October was 1992 at 76%, and the least humid was 2010 at 65%.
October receives about 6.5 kWh/m²/day of solar energy in Perth. The sunniest Octobers were 2010 and 2020 at 7.1 kWh/m²/day, and the cloudiest was 1988 at 5.9.
Average wind speed in Perth during October is 5.1 m/s. The windiest October was 1999 at 5.7 m/s, while the calmest was 2015 at 4.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 16.9°C | 16.8°C | 16.8°C | 17.7°C | 17.6°C | +0.7°C |
| Avg High | 19.6°C | 19.5°C | 19.5°C | 20.5°C | 20.4°C | +0.8°C |
| Avg Low | 14.3°C | 14.1°C | 14.1°C | 14.9°C | 14.8°C | +0.5°C |
| Avg Rain | 33 mm | 43 mm | 35 mm | 29 mm | 37 mm | +4 mm |
October temperatures in Perth have risen by about 0.3°C between 1981–1985 and 2021–2025.
October has ranged from a record low of 9.4°C (1994) to a record high of 32.6°C (2023).
Rainfall in October is one of the drier months, averaging 35 mm, with a wettest year of 92 mm.
A good time to visit Perth
October is a good time to visit Perth, with days averaging 19.9°C and nights around 14.4°C (mean 17.2°C, cooler than Perth's yearly average) and moderate rainfall. December and March are marginally more temperate, but October still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 19.6°C | 17.4°C | 15.1°C | 27.0°C | 12.9°C | 54 mm | 73% | 4.7 m/s | 6.6 |
| 2024 | 21.0°C | 18.4°C | 15.7°C | 28.9°C | 13.3°C | 38 mm | 72% | 4.9 m/s | 6.7 |
| 2023 | 22.6°C | 19.0°C | 15.4°C | 32.6°C | 13.0°C | 14 mm | 67% | 5.1 m/s | 7 |
| 2022 | 18.9°C | 16.3°C | 13.8°C | 23.4°C | 11.4°C | 40 mm | 72% | 5.3 m/s | 6.6 |
| 2021 | 18.7°C | 16.3°C | 13.8°C | 28.4°C | 10.4°C | 62 mm | 71% | 5.2 m/s | 6.2 |
| 2020 | 21.4°C | 18.2°C | 15.0°C | 30.3°C | 11.4°C | 13 mm | 70% | 5 m/s | 7.1 |
| 2019 | 20.4°C | 17.8°C | 15.2°C | 28.7°C | 12.6°C | 34 mm | 72% | 5 m/s | 6.7 |
| 2018 | 20.2°C | 17.7°C | 15.2°C | 24.9°C | 12.8°C | 40 mm | 75% | 4.9 m/s | 6.3 |
| 2017 | 19.6°C | 16.8°C | 14.1°C | 25.9°C | 10.4°C | 17 mm | 73% | 5.5 m/s | 6.5 |
| 2016 | 18.7°C | 16.2°C | 13.7°C | 27.2°C | 10.5°C | 26 mm | 72% | 5.5 m/s | 6.8 |
| 2015 🔥 | 22.0°C | 19.1°C | 16.2°C | 29.2°C | 12.0°C | 20 mm | 74% | 4.3 m/s | 6.5 |
| 2014 | 20.7°C | 17.9°C | 15.2°C | 31.2°C | 12.5°C | 41 mm | 74% | 4.9 m/s | 6.4 |
| 2013 | 20.3°C | 17.6°C | 14.8°C | 28.6°C | 11.6°C | 27 mm | 74% | 4.5 m/s | 6.8 |
| 2012 | 20.8°C | 17.9°C | 15.0°C | 29.2°C | 12.0°C | 15 mm | 69% | 5 m/s | 6.5 |
| 2011 | 20.8°C | 18.0°C | 15.2°C | 26.2°C | 12.2°C | 60 mm | 74% | 4.6 m/s | 6.1 |
| 2010 | 21.3°C | 17.8°C | 14.3°C | 26.3°C | 11.2°C | 13 mm | 65% | 5.4 m/s | 7.1 |
| 2009 | 20.1°C | 17.2°C | 14.2°C | 29.6°C | 11.3°C | 13 mm | 75% | 5 m/s | 6.4 |
| 2008 | 20.5°C | 17.8°C | 15.1°C | 27.6°C | 11.3°C | 46 mm | 74% | 5.1 m/s | 6.2 |
| 2007 | 19.5°C | 16.8°C | 14.1°C | 26.0°C | 11.5°C | 49 mm | 74% | 5.3 m/s | 6.5 |
| 2006 | 21.0°C | 17.9°C | 14.8°C | 28.6°C | 12.0°C | 25 mm | 71% | 5.4 m/s | 6.5 |
| 2005 | 17.7°C | 15.7°C | 13.6°C | 21.8°C | 10.2°C | 56 mm | 75% | 5.1 m/s | 6.2 |
| 2004 | 19.4°C | 17.0°C | 14.5°C | 25.3°C | 11.4°C | 38 mm | 75% | 5.2 m/s | 6.6 |
| 2003 | 19.1°C | 16.3°C | 13.6°C | 24.8°C | 10.9°C | 21 mm | 76% | 5.1 m/s | 6.8 |
| 2002 | 18.5°C | 16.3°C | 14.2°C | 23.5°C | 10.0°C | 60 mm | 75% | 5 m/s | 6.4 |
| 2001 | 19.1°C | 16.1°C | 13.1°C | 23.6°C | 11.1°C | 35 mm | 72% | 5.6 m/s | 6.6 |
| 2000 | 20.4°C | 17.3°C | 14.3°C | 27.1°C | 12.3°C | 7 mm | 72% | 4.9 m/s | 7 |
| 1999 🌧️ | 19.4°C | 16.5°C | 13.7°C | 27.4°C | 11.2°C | 92 mm | 75% | 5.7 m/s | 6.7 |
| 1998 | 19.8°C | 16.9°C | 14.1°C | 27.4°C | 11.2°C | 25 mm | 73% | 5.5 m/s | 6.7 |
| 1997 | 20.4°C | 17.5°C | 14.7°C | 28.3°C | 11.0°C | 34 mm | 72% | 5.6 m/s | 6.7 |
| 1996 | 20.4°C | 17.4°C | 14.4°C | 27.3°C | 10.4°C | 52 mm | 73% | 5.1 m/s | 6.6 |
| 1995 | 20.3°C | 17.6°C | 14.9°C | 25.1°C | 10.3°C | 74 mm | 74% | 4.8 m/s | 6.8 |
| 1994 | 19.6°C | 16.5°C | 13.4°C | 28.6°C | 9.4°C | 20 mm | 73% | 5.3 m/s | 6.7 |
| 1993 ❄️ | 17.7°C | 15.3°C | 13.0°C | 22.9°C | 9.7°C | 35 mm | 74% | 5.3 m/s | 6.3 |
| 1992 | 18.8°C | 16.3°C | 13.7°C | 26.2°C | 9.5°C | 15 mm | 76% | 4.9 m/s | 6.4 |
| 1991 | 20.2°C | 17.6°C | 14.9°C | 26.4°C | 11.3°C | 33 mm | 75% | 4.7 m/s | 6.4 |
| 1990 | 18.5°C | 16.2°C | 14.0°C | 25.3°C | 11.7°C | 46 mm | 75% | 5.3 m/s | 6.3 |
| 1989 | 18.2°C | 16.2°C | 14.2°C | 23.2°C | 10.7°C | 85 mm | 72% | 5.2 m/s | 6.4 |
| 1988 | 19.5°C | 17.4°C | 15.4°C | 28.8°C | 12.6°C | 40 mm | 74% | 5.2 m/s | 5.9 |
| 1987 | 20.1°C | 17.1°C | 14.2°C | 26.2°C | 11.2°C | 19 mm | 72% | 5.3 m/s | 6.2 |
| 1986 | 17.7°C | 15.6°C | 13.4°C | 21.3°C | 10.1°C | 28 mm | 71% | 5 m/s | 6.5 |
| 1985 | 19.9°C | 16.8°C | 13.7°C | 24.9°C | 10.0°C | 21 mm | 68% | 5.6 m/s | 6.7 |
| 1984 | 20.0°C | 17.5°C | 15.0°C | 26.8°C | 12.6°C | 19 mm | 70% | 4.8 m/s | 6.3 |
| 1983 | 20.7°C | 17.5°C | 14.2°C | 28.4°C | 11.6°C | 15 mm | 71% | 4.9 m/s | — |
| 1982 | 20.3°C | 17.4°C | 14.4°C | 25.9°C | 10.1°C | 40 mm | 72% | 5.3 m/s | — |
| 1981 | 19.8°C | 16.9°C | 14.0°C | 30.9°C | 10.7°C | 33 mm | 72% | 5 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 19.9°C with lows near 14.4°C (mean 17.2°C), based on 45 years of NASA POWER data.
October averages 35 mm of rainfall in Perth, one of the drier months. The wettest on record was 92 mm in 1999.
The hottest October reached 32.6°C in 2023. The coldest dipped to 9.4°C in 1994.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 0.3°C. Daytime highs moved from 20.1°C to 20.2°C and overnight lows from 14.3°C to 14.8°C over the same span.
October is one of the cooler months of the year in Perth and one of the drier months, so plan for around 19.9°C daytime highs and 14.4°C at night.
Not quite — October is the 5th coolest month in Perth, averaging 17.2°C.
For October in Perth, pack light layers you can adjust through the day, with typical highs of 19.9°C and lows of 14.4°C.
Relative humidity in October averages 73% — moderately humid.
Average wind speed in October is 5.1 m/s. The windiest October on record averaged 5.7 m/s (1999).
The wettest October on record was 1999 with 92 mm. On average, October sees 35 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Perth behaves each October, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for October specifically, along with year-by-year records and how the month has changed over the decades.
