October is close to Sydney's year-round average, with average highs near 21.2°C and lows around 15.2°C (mean 18.2°C). It is one of the drier months, averaging 69 mm of rainfall and 70% relative humidity across the period.
October is close to Sydney's year-round average. Across 45 years of records, the warmest October in Sydney was 2015 — when the month averaged 20.7°C — while the coldest was 1990 at 16.5°C. Typical October days reach 21.2°C with nights near 15.2°C. The long-term trend is warming, about 0.5°C per decade.
October is one of the drier months in Sydney, averaging 69 mm of rainfall. The wettest October on record was 2004 with 193 mm, while the driest was 1988 at 4 mm.
Relative humidity in Sydney during October averages 70%. The most humid October was 2022 at 79%, and the least humid was 2013 at 61%.
October receives about 5.7 kWh/m²/day of solar energy in Sydney. The sunniest October was 1988 at 6.5 kWh/m²/day, and the cloudiest was 2022 at 4.7.
Average wind speed in Sydney during October is 3.1 m/s. The windiest October was 2016 at 3.7 m/s, while the calmest was 2007 at 2.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 17.6°C | 17.5°C | 18.5°C | 18.8°C | 19.0°C | +1.4°C |
| Avg High | 20.6°C | 20.4°C | 21.6°C | 21.8°C | 21.9°C | +1.3°C |
| Avg Low | 14.6°C | 14.6°C | 15.4°C | 15.7°C | 16.0°C | +1.4°C |
| Avg Rain | 94 mm | 59 mm | 69 mm | 54 mm | 73 mm | -21 mm |
October temperatures in Sydney have risen by about 1.5°C between 1981–1985 and 2021–2025.
October has ranged from a record low of 10°C (1984) to a record high of 32.3°C (2015).
Rainfall in October is one of the drier months, averaging 69 mm, with a wettest year of 193 mm.
A good time to visit Sydney
October is a good time to visit Sydney, with days averaging 21.2°C and nights around 15.2°C (mean 18.2°C, close to Sydney'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 | 24.1°C | 20.5°C | 16.8°C | 31.9°C | 14.1°C | 30 mm | 65% | 2.8 m/s | 5.7 |
| 2024 | 21.7°C | 18.9°C | 16.0°C | 26.5°C | 13.9°C | 27 mm | 68% | 3.2 m/s | 5.5 |
| 2023 | 22.9°C | 19.4°C | 16.0°C | 29.4°C | 13.7°C | 25 mm | 63% | 3.4 m/s | 6.4 |
| 2022 | 19.7°C | 17.8°C | 15.8°C | 23.7°C | 11.8°C | 169 mm | 79% | 3.2 m/s | 4.7 |
| 2021 | 21.3°C | 18.3°C | 15.3°C | 28.4°C | 13.2°C | 65 mm | 70% | 3 m/s | 6 |
| 2020 | 21.6°C | 18.8°C | 15.9°C | 27.7°C | 12.5°C | 121 mm | 76% | 3 m/s | 5.4 |
| 2019 | 22.2°C | 18.9°C | 15.6°C | 29.8°C | 12.8°C | 27 mm | 68% | 2.8 m/s | 6.3 |
| 2018 | 20.4°C | 18.2°C | 16.1°C | 25.4°C | 14.3°C | 121 mm | 78% | 3.4 m/s | 4.9 |
| 2017 | 22.2°C | 19.4°C | 16.6°C | 29.0°C | 13.1°C | 60 mm | 72% | 3 m/s | 5.4 |
| 2016 | 21.8°C | 18.3°C | 14.8°C | 28.3°C | 12.1°C | 25 mm | 62% | 3.7 m/s | 5.9 |
| 2015 🔥 | 24.0°C | 20.7°C | 17.3°C | 32.3°C | 14.2°C | 34 mm | 70% | 3 m/s | 5.7 |
| 2014 | 22.5°C | 19.0°C | 15.6°C | 29.3°C | 12.4°C | 68 mm | 71% | 2.9 m/s | 6 |
| 2013 | 23.4°C | 19.5°C | 15.7°C | 30.0°C | 13.0°C | 17 mm | 61% | 3.3 m/s | 6.4 |
| 2012 | 21.1°C | 17.7°C | 14.3°C | 28.4°C | 10.2°C | 38 mm | 67% | 2.9 m/s | 6 |
| 2011 | 20.2°C | 17.6°C | 15.0°C | 27.1°C | 12.5°C | 64 mm | 72% | 2.8 m/s | 5.3 |
| 2010 | 20.6°C | 18.2°C | 15.8°C | 26.0°C | 11.4°C | 90 mm | 75% | 3.2 m/s | 4.9 |
| 2009 | 20.5°C | 17.9°C | 15.3°C | 30.3°C | 12.1°C | 98 mm | 70% | 3.5 m/s | 5.3 |
| 2008 | 21.9°C | 18.6°C | 15.4°C | 29.8°C | 11.9°C | 73 mm | 72% | 3 m/s | 5.4 |
| 2007 | 22.7°C | 19.2°C | 15.7°C | 30.0°C | 12.0°C | 26 mm | 69% | 2.7 m/s | 5.9 |
| 2006 | 22.2°C | 18.9°C | 15.6°C | 31.8°C | 13.6°C | 12 mm | 66% | 3.4 m/s | 5.7 |
| 2005 | 22.5°C | 19.5°C | 16.5°C | 28.1°C | 12.7°C | 86 mm | 71% | 3.1 m/s | 5.3 |
| 2004 🌧️ | 20.6°C | 17.9°C | 15.1°C | 30.6°C | 12.8°C | 193 mm | 73% | 3.3 m/s | 5.7 |
| 2003 | 19.6°C | 16.9°C | 14.2°C | 25.3°C | 10.8°C | 76 mm | 72% | 3.4 m/s | 5.5 |
| 2002 | 22.6°C | 19.0°C | 15.4°C | 28.8°C | 12.9°C | 8 mm | 63% | 3 m/s | 6.3 |
| 2001 | 21.7°C | 18.4°C | 15.0°C | 26.0°C | 12.1°C | 48 mm | 64% | 3.1 m/s | 6.2 |
| 2000 | 21.3°C | 18.3°C | 15.3°C | 31.0°C | 12.3°C | 67 mm | 68% | 3.2 m/s | 5.3 |
| 1999 | 21.0°C | 18.3°C | 15.6°C | 25.6°C | 12.8°C | 184 mm | 79% | 2.9 m/s | 5.3 |
| 1998 | 20.6°C | 17.7°C | 14.9°C | 26.2°C | 11.2°C | 42 mm | 71% | 3.1 m/s | 5.7 |
| 1997 | 21.1°C | 18.1°C | 15.1°C | 28.1°C | 12.2°C | 52 mm | 71% | 3.1 m/s | 6 |
| 1996 | 20.4°C | 17.4°C | 14.4°C | 26.3°C | 10.7°C | 38 mm | 73% | 2.9 m/s | 5.8 |
| 1995 | 19.7°C | 16.9°C | 14.1°C | 26.0°C | 11.2°C | 46 mm | 75% | 3 m/s | 5.6 |
| 1994 | 20.8°C | 17.4°C | 13.9°C | 30.7°C | 11.5°C | 37 mm | 67% | 3.2 m/s | 5.9 |
| 1993 | 20.3°C | 17.3°C | 14.3°C | 26.6°C | 10.7°C | 59 mm | 70% | 3.1 m/s | 5.8 |
| 1992 | 19.8°C | 17.2°C | 14.7°C | 24.8°C | 11.9°C | 66 mm | 72% | 3.6 m/s | 5.2 |
| 1991 | 21.2°C | 18.1°C | 14.9°C | 29.5°C | 13.2°C | 23 mm | 71% | 2.8 m/s | 5.9 |
| 1990 ❄️ | 19.4°C | 16.5°C | 13.6°C | 29.9°C | 10.7°C | 40 mm | 76% | 3.3 m/s | 5.7 |
| 1989 | 21.5°C | 18.2°C | 14.9°C | 26.0°C | 11.8°C | 22 mm | 63% | 3.4 m/s | 6 |
| 1988 | 22.9°C | 18.9°C | 14.9°C | 30.3°C | 12.2°C | 4 mm | 65% | 2.9 m/s | 6.5 |
| 1987 | 19.3°C | 16.9°C | 14.5°C | 24.9°C | 10.7°C | 191 mm | 74% | 3.4 m/s | 5.4 |
| 1986 | 20.1°C | 16.9°C | 13.8°C | 27.4°C | 11.7°C | 69 mm | 69% | 3 m/s | 5.9 |
| 1985 | 19.8°C | 17.4°C | 15.0°C | 26.0°C | 11.4°C | 162 mm | 77% | 3.2 m/s | 5.5 |
| 1984 | 20.4°C | 17.4°C | 14.4°C | 28.9°C | 10.0°C | 38 mm | 71% | 2.8 m/s | 5.4 |
| 1983 | 20.3°C | 17.7°C | 15.1°C | 28.1°C | 10.6°C | 145 mm | 76% | 3 m/s | — |
| 1982 | 20.1°C | 16.8°C | 13.6°C | 28.1°C | 10.1°C | 51 mm | 69% | 3.2 m/s | — |
| 1981 | 20.8°C | 18.0°C | 15.1°C | 27.9°C | 11.6°C | 160 mm | 73% | 3 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 21.2°C with lows near 15.2°C (mean 18.2°C), based on 45 years of NASA POWER data.
October averages 69 mm of rainfall in Sydney, one of the drier months. The wettest on record was 193 mm in 2004.
The hottest October reached 32.3°C in 2015. The coldest dipped to 10°C in 1984.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 1.5°C. Daytime highs moved from 20.3°C to 21.9°C and overnight lows from 14.6°C to 16°C over the same span.
October is close to Sydney's year-round average and one of the drier months, so plan for around 21.2°C daytime highs and 15.2°C at night.
Not quite — October is the 6th coolest month in Sydney, averaging 18.2°C.
For October in Sydney, pack light layers you can adjust through the day, with typical highs of 21.2°C and lows of 15.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 70% — moderately humid.
Average wind speed in October is 3.1 m/s. The windiest October on record averaged 3.7 m/s (2016).
The wettest October on record was 2004 with 193 mm. On average, October sees 69 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 Sydney 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.
