October is one of the cooler months of the year in Adelaide, with average highs near 20.9°C and lows around 9.4°C (mean 15.2°C). It is about average for rainfall, averaging 33 mm of rainfall and 65% relative humidity across the period.
October is one of the cooler months of the year in Adelaide. Across 45 years of records, the warmest October in Adelaide was 2015 — when the month averaged 18.8°C — while the coldest was 1986 at 12.6°C. Typical October days reach 20.9°C with nights near 9.4°C. The long-term trend is warming, about 0.5°C per decade.
October is about average for rainfall in Adelaide, averaging 33 mm of rainfall. The wettest October on record was 2022 with 100 mm, while the driest were 2017 and 2019 at 0 mm.
Relative humidity in Adelaide during October averages 65%. The most humid October was 1992 at 76%, and the least humid was 2015 at 53%.
October receives about 6.1 kWh/m²/day of solar energy in Adelaide. The sunniest October was 2006 at 6.8 kWh/m²/day, and the cloudiest was 2022 at 5.2.
Average wind speed in Adelaide during October is 2.7 m/s. The windiest October was 2016 at 3.4 m/s, while the calmest was 1983 at 2.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.3°C | 14.9°C | 14.8°C | 16.2°C | 15.7°C | +1.4°C |
| Avg High | 20.0°C | 20.5°C | 20.5°C | 22.3°C | 21.2°C | +1.2°C |
| Avg Low | 8.6°C | 9.3°C | 9.1°C | 10.0°C | 10.1°C | +1.5°C |
| Avg Rain | 36 mm | 46 mm | 38 mm | 13 mm | 34 mm | -2 mm |
October temperatures in Adelaide have risen by about 1.1°C between 1981–1985 and 2021–2025.
October has ranged from a record low of 3.1°C (1987) to a record high of 36.1°C (1987).
Rainfall in October is about average for rainfall, averaging 33 mm, with a wettest year of 100 mm.
A good time to visit Adelaide
October is a good time to visit Adelaide, with days averaging 20.9°C and nights around 9.4°C (mean 15.2°C, close to Adelaide's yearly average) and moderate rainfall. February and January 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 | 21.7°C | 16.2°C | 10.7°C | 29.5°C | 6.3°C | 24 mm | 65% | 2.9 m/s | 5.8 |
| 2024 | 23.7°C | 17.4°C | 11.1°C | 32.1°C | 6.4°C | 18 mm | 61% | 2.5 m/s | 6.4 |
| 2023 | 21.2°C | 15.5°C | 9.7°C | 30.7°C | 6.0°C | 10 mm | 59% | 3 m/s | 6.6 |
| 2022 🌧️ | 19.7°C | 15.1°C | 10.6°C | 26.1°C | 6.2°C | 100 mm | 74% | 2.6 m/s | 5.2 |
| 2021 | 20.1°C | 14.5°C | 8.8°C | 29.4°C | 5.2°C | 14 mm | 63% | 2.7 m/s | 6.4 |
| 2020 | 20.7°C | 15.3°C | 9.8°C | 30.3°C | 6.4°C | 40 mm | 68% | 2.7 m/s | 5.4 |
| 2019 | 23.9°C | 17.3°C | 10.6°C | 35.2°C | 6.3°C | 0 mm | 54% | 2.7 m/s | 6.5 |
| 2018 | 23.3°C | 16.9°C | 10.5°C | 32.7°C | 5.9°C | 1 mm | 55% | 2.7 m/s | 5.9 |
| 2017 | 23.2°C | 17.0°C | 10.8°C | 33.0°C | 7.2°C | 0 mm | 59% | 2.7 m/s | 6.3 |
| 2016 | 19.2°C | 13.8°C | 8.3°C | 28.2°C | 4.8°C | 0 mm | 64% | 3.4 m/s | 6.2 |
| 2015 🔥 | 25.9°C | 18.8°C | 11.7°C | 32.9°C | 7.1°C | 2 mm | 53% | 2.4 m/s | 6.5 |
| 2014 | 24.6°C | 17.8°C | 11.1°C | 34.9°C | 6.8°C | 7 mm | 58% | 2.5 m/s | 6.6 |
| 2013 | 20.4°C | 15.0°C | 9.5°C | 29.7°C | 5.3°C | 23 mm | 64% | 3 m/s | 6.2 |
| 2012 | 21.7°C | 15.4°C | 9.0°C | 30.4°C | 5.7°C | 22 mm | 62% | 2.4 m/s | 6.5 |
| 2011 | 20.8°C | 15.4°C | 9.9°C | 31.2°C | 4.9°C | 33 mm | 68% | 2.4 m/s | 5.6 |
| 2010 | 19.8°C | 14.4°C | 9.1°C | 27.2°C | 6.0°C | 46 mm | 70% | 2.4 m/s | 5.9 |
| 2009 | 20.3°C | 14.7°C | 9.0°C | 31.2°C | 4.1°C | 36 mm | 68% | 2.7 m/s | 6.2 |
| 2008 | 22.6°C | 16.2°C | 9.9°C | 31.2°C | 5.5°C | 9 mm | 60% | 2.6 m/s | 6.3 |
| 2007 | 21.4°C | 15.3°C | 9.2°C | 33.2°C | 4.1°C | 35 mm | 63% | 3 m/s | 5.9 |
| 2006 | 22.9°C | 15.8°C | 8.7°C | 33.2°C | 4.3°C | 1 mm | 54% | 2.8 m/s | 6.8 |
| 2005 | 20.5°C | 15.1°C | 9.6°C | 27.0°C | 5.3°C | 91 mm | 71% | 2.8 m/s | 5.7 |
| 2004 | 22.3°C | 16.0°C | 9.7°C | 33.3°C | 5.9°C | 10 mm | 62% | 2.4 m/s | 6.5 |
| 2003 | 17.7°C | 12.7°C | 7.8°C | 29.6°C | 3.5°C | 45 mm | 71% | 2.7 m/s | 5.9 |
| 2002 | 20.4°C | 14.8°C | 9.1°C | 30.7°C | 5.1°C | 24 mm | 63% | 3.2 m/s | 5.6 |
| 2001 | 17.1°C | 12.8°C | 8.5°C | 25.9°C | 4.3°C | 57 mm | 74% | 3 m/s | 5.3 |
| 2000 | 19.6°C | 14.4°C | 9.1°C | 29.0°C | 5.0°C | 70 mm | 70% | 2.5 m/s | 5.9 |
| 1999 | 21.7°C | 16.1°C | 10.5°C | 30.1°C | 5.7°C | 51 mm | 66% | 2.6 m/s | 6.2 |
| 1998 | 19.6°C | 14.3°C | 9.0°C | 33.3°C | 4.8°C | 39 mm | 68% | 2.7 m/s | 5.7 |
| 1997 | 20.9°C | 15.3°C | 9.6°C | 32.6°C | 4.4°C | 85 mm | 67% | 2.7 m/s | 6 |
| 1996 | 20.1°C | 14.2°C | 8.3°C | 29.5°C | 5.3°C | 20 mm | 68% | 2.6 m/s | 6.6 |
| 1995 | 20.1°C | 14.5°C | 8.9°C | 27.5°C | 4.9°C | 32 mm | 67% | 3.1 m/s | 5.8 |
| 1994 | 21.1°C | 15.5°C | 9.9°C | 32.9°C | 6.8°C | 41 mm | 61% | 2.7 m/s | 6.2 |
| 1993 | 19.5°C | 14.2°C | 8.8°C | 27.9°C | 5.1°C | 60 mm | 66% | 2.8 m/s | 6.2 |
| 1992 | 19.1°C | 14.0°C | 8.9°C | 27.6°C | 3.8°C | 85 mm | 76% | 2.4 m/s | 5.5 |
| 1991 | 21.4°C | 15.6°C | 9.8°C | 30.4°C | 4.5°C | 7 mm | 64% | 2.6 m/s | 6.4 |
| 1990 | 21.1°C | 15.2°C | 9.4°C | 32.9°C | 3.1°C | 36 mm | 66% | 2.9 m/s | 6.1 |
| 1989 | 18.4°C | 13.3°C | 8.3°C | 26.6°C | 4.3°C | 37 mm | 69% | 3.2 m/s | 6.1 |
| 1988 | 21.2°C | 15.6°C | 10.0°C | 32.1°C | 6.4°C | 15 mm | 63% | 3.2 m/s | 6.4 |
| 1987 | 20.1°C | 14.3°C | 8.4°C | 36.1°C | 3.1°C | 48 mm | 68% | 2.7 m/s | 6.4 |
| 1986 ❄️ | 17.4°C | 12.6°C | 7.9°C | 26.1°C | 5.4°C | 60 mm | 69% | 3.1 m/s | 5.8 |
| 1985 | 20.4°C | 14.6°C | 8.9°C | 27.4°C | 5.4°C | 40 mm | 67% | 2.7 m/s | 6.1 |
| 1984 | 20.6°C | 14.7°C | 8.8°C | 26.8°C | 5.5°C | 34 mm | 65% | 2.5 m/s | 6.2 |
| 1983 | 20.2°C | 14.3°C | 8.3°C | 31.4°C | 3.7°C | 48 mm | 69% | 2.3 m/s | — |
| 1982 | 20.2°C | 14.5°C | 8.8°C | 30.7°C | 4.9°C | 18 mm | 59% | 2.8 m/s | — |
| 1981 | 21.2°C | 14.8°C | 8.4°C | 30.4°C | 5.2°C | 26 mm | 64% | 2.6 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 20.9°C with lows near 9.4°C (mean 15.2°C), based on 45 years of NASA POWER data.
October averages 33 mm of rainfall in Adelaide, about average for rainfall. The wettest on record was 100 mm in 2022.
The hottest October reached 36.1°C in 1987. The coldest dipped to 3.1°C in 1987.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 1.1°C. Daytime highs moved from 20.5°C to 21.3°C and overnight lows from 8.6°C to 10.2°C over the same span.
October is one of the cooler months of the year in Adelaide and about average for rainfall, so plan for around 20.9°C daytime highs and 9.4°C at night.
Not quite — October is the 6th coolest month in Adelaide, averaging 15.2°C.
For October in Adelaide, pack light layers you can adjust through the day, with typical highs of 20.9°C and lows of 9.4°C.
Relative humidity in October averages 65% — moderately humid.
Average wind speed in October is 2.7 m/s. The windiest October on record averaged 3.4 m/s (2016).
The wettest October on record was 2022 with 100 mm. On average, October sees 33 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 Adelaide 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.
