August is one of the cooler months of the year in Adelaide, with average highs near 14.9°C and lows around 6.6°C (mean 10.8°C). It is a relatively wet time of year, averaging 57 mm of rainfall and 77% relative humidity across the period.
August is one of the cooler months of the year in Adelaide. Across 45 years of records, the warmest August in Adelaide was 2024 — when the month averaged 13.4°C — while the coldest was 1989 at 9°C. Typical August days reach 14.9°C with nights near 6.6°C. The long-term trend is warming, about 0.3°C per decade.
August is a relatively wet time of year in Adelaide, averaging 57 mm of rainfall. The wettest August on record was 1992 with 114 mm, while the driest was 2014 at 11 mm.
Relative humidity in Adelaide during August averages 77%. The most humid August was 1989 at 83%, and the least humid was 1982 at 67%.
August receives about 3.5 kWh/m²/day of solar energy in Adelaide. The sunniest Augusts were 2007 and 2014 at 3.9 kWh/m²/day, and the cloudiest was 2001 at 3.1.
Average wind speed in Adelaide during August is 2.6 m/s. The windiest August was 1991 at 3.6 m/s, while the calmest was 2014 at 1.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 10.4°C | 10.4°C | 10.7°C | 10.9°C | 11.5°C | +1.1°C |
| Avg High | 14.4°C | 14.6°C | 15.1°C | 15.1°C | 15.8°C | +1.4°C |
| Avg Low | 6.3°C | 6.4°C | 6.4°C | 6.7°C | 7.2°C | +0.9°C |
| Avg Rain | 73 mm | 62 mm | 56 mm | 47 mm | 44 mm | -29 mm |
August temperatures in Adelaide have risen by about 1.1°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 0.7°C (2020) to a record high of 26.7°C (2024).
Rainfall in August is a relatively wet time of year, averaging 57 mm, with a wettest year of 114 mm.
A quieter season to visit Adelaide
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Adelaide. That said, August — with days averaging 14.9°C and nights around 6.6°C (mean 10.8°C) and moderate rainfall (57 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 15.6°C | 11.2°C | 6.8°C | 21.6°C | 2.2°C | 38 mm | 75% | 2.6 m/s | 3.5 |
| 2024 🔥 | 18.0°C | 13.4°C | 8.8°C | 26.7°C | 4.7°C | 35 mm | 72% | 2.8 m/s | 3.5 |
| 2023 | 16.8°C | 12.0°C | 7.2°C | 24.5°C | 3.4°C | 26 mm | 75% | 2.1 m/s | 3.5 |
| 2022 | 14.8°C | 11.2°C | 7.6°C | 20.8°C | 4.4°C | 76 mm | 79% | 2.7 m/s | 3.3 |
| 2021 | 15.4°C | 11.1°C | 6.8°C | 21.2°C | 2.8°C | 36 mm | 79% | 2.3 m/s | 3.8 |
| 2020 | 14.2°C | 10.1°C | 6.0°C | 22.6°C | 0.7°C | 53 mm | 79% | 2.4 m/s | 3.5 |
| 2019 | 15.2°C | 10.6°C | 6.1°C | 19.5°C | 2.2°C | 34 mm | 72% | 2.6 m/s | 3.5 |
| 2018 | 15.9°C | 11.5°C | 7.1°C | 24.0°C | 4.0°C | 40 mm | 67% | 3.1 m/s | 3.5 |
| 2017 | 15.2°C | 11.1°C | 7.0°C | 22.2°C | 3.6°C | 37 mm | 73% | 2.9 m/s | 3.3 |
| 2016 | 15.8°C | 11.2°C | 6.7°C | 22.5°C | 3.2°C | 30 mm | 75% | 2.4 m/s | 3.7 |
| 2015 | 14.7°C | 10.5°C | 6.3°C | 21.5°C | 2.6°C | 30 mm | 78% | 2.3 m/s | 3.4 |
| 2014 | 15.4°C | 10.5°C | 5.6°C | 22.9°C | 1.3°C | 11 mm | 76% | 1.7 m/s | 3.9 |
| 2013 | 15.0°C | 11.3°C | 7.7°C | 22.4°C | 3.7°C | 81 mm | 83% | 3 m/s | 3.3 |
| 2012 | 13.9°C | 10.2°C | 6.5°C | 18.2°C | 3.4°C | 64 mm | 80% | 2.7 m/s | 3.2 |
| 2011 | 16.2°C | 12.1°C | 7.9°C | 23.1°C | 5.1°C | 57 mm | 79% | 2.1 m/s | 3.5 |
| 2010 | 13.2°C | 9.8°C | 6.3°C | 17.9°C | 2.8°C | 89 mm | 79% | 3 m/s | 3.2 |
| 2009 | 16.3°C | 11.9°C | 7.6°C | 23.7°C | 2.6°C | 40 mm | 78% | 2.9 m/s | 3.4 |
| 2008 | 13.1°C | 9.6°C | 6.2°C | 17.5°C | 3.8°C | 77 mm | 80% | 2.5 m/s | 3.4 |
| 2007 | 16.0°C | 11.4°C | 6.8°C | 25.6°C | 1.1°C | 23 mm | 75% | 2.5 m/s | 3.9 |
| 2006 | 16.9°C | 11.7°C | 6.4°C | 23.2°C | 3.3°C | 15 mm | 73% | 2 m/s | 3.8 |
| 2005 | 15.8°C | 11.3°C | 6.9°C | 23.1°C | 3.4°C | 66 mm | 75% | 2.6 m/s | 3.4 |
| 2004 | 14.9°C | 10.6°C | 6.4°C | 22.3°C | 1.8°C | 77 mm | 79% | 2.6 m/s | 3.5 |
| 2003 | 13.4°C | 9.3°C | 5.3°C | 18.9°C | 1.3°C | 87 mm | 78% | 2.9 m/s | 3.2 |
| 2002 | 15.3°C | 10.5°C | 5.7°C | 20.9°C | 0.9°C | 32 mm | 73% | 2.3 m/s | 3.7 |
| 2001 | 15.0°C | 11.0°C | 7.0°C | 20.0°C | 2.9°C | 78 mm | 75% | 2.9 m/s | 3.1 |
| 2000 | 14.2°C | 10.1°C | 5.9°C | 18.2°C | 3.5°C | 65 mm | 80% | 2.2 m/s | 3.4 |
| 1999 | 16.0°C | 11.1°C | 6.3°C | 22.7°C | 2.2°C | 34 mm | 75% | 2.2 m/s | 3.7 |
| 1998 | 15.5°C | 11.1°C | 6.6°C | 20.9°C | 3.0°C | 48 mm | 78% | 2.2 m/s | 3.4 |
| 1997 | 14.0°C | 9.9°C | 5.9°C | 19.4°C | 2.1°C | 76 mm | 75% | 2.4 m/s | 3.3 |
| 1996 | 13.5°C | 10.2°C | 7.0°C | 18.4°C | 4.4°C | 87 mm | 82% | 2.8 m/s | 3.3 |
| 1995 | 15.8°C | 10.9°C | 6.1°C | 22.5°C | 3.3°C | 24 mm | 77% | 2.4 m/s | 3.7 |
| 1994 | 14.1°C | 9.8°C | 5.4°C | 21.2°C | 2.2°C | 21 mm | 75% | 2.2 m/s | 3.7 |
| 1993 | 16.3°C | 11.7°C | 7.1°C | 22.8°C | 2.1°C | 54 mm | 71% | 2.6 m/s | 3.6 |
| 1992 🌧️ | 13.6°C | 9.7°C | 5.8°C | 19.4°C | 1.9°C | 114 mm | 78% | 3 m/s | 3.4 |
| 1991 | 13.9°C | 10.2°C | 6.6°C | 18.6°C | 3.0°C | 83 mm | 78% | 3.6 m/s | 3.3 |
| 1990 | 12.8°C | 9.7°C | 6.7°C | 16.1°C | 2.5°C | 83 mm | 82% | 3.1 m/s | 3.2 |
| 1989 ❄️ | 12.5°C | 9.0°C | 5.5°C | 18.2°C | 1.4°C | 76 mm | 83% | 2.8 m/s | 3.6 |
| 1988 | 15.0°C | 10.9°C | 6.8°C | 21.4°C | 1.6°C | 40 mm | 77% | 2.5 m/s | 3.3 |
| 1987 | 13.9°C | 10.1°C | 6.2°C | 18.3°C | 2.1°C | 42 mm | 82% | 2.3 m/s | 3.4 |
| 1986 | 13.8°C | 10.0°C | 6.2°C | 18.8°C | 2.2°C | 96 mm | 80% | 2.6 m/s | 3.4 |
| 1985 | 13.9°C | 10.1°C | 6.3°C | 20.9°C | 2.5°C | 97 mm | 80% | 2.6 m/s | 3.3 |
| 1984 | 13.6°C | 10.2°C | 6.7°C | 19.9°C | 4.4°C | 106 mm | 80% | 3.1 m/s | 3.3 |
| 1983 | 15.0°C | 10.6°C | 6.2°C | 20.6°C | 2.0°C | 74 mm | 79% | 2.3 m/s | — |
| 1982 | 18.4°C | 12.4°C | 6.4°C | 25.3°C | 1.7°C | 21 mm | 67% | 2 m/s | — |
| 1981 | 13.7°C | 10.1°C | 6.4°C | 17.0°C | 2.3°C | 108 mm | 80% | 3.3 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 14.9°C with lows near 6.6°C (mean 10.8°C), based on 45 years of NASA POWER data.
August averages 57 mm of rainfall in Adelaide, a relatively wet time of year. The wettest on record was 114 mm in 1992.
The hottest August reached 26.7°C in 2024. The coldest dipped to 0.7°C in 2020.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.1°C. Daytime highs moved from 14.9°C to 16.1°C and overnight lows from 6.4°C to 7.4°C over the same span.
August is one of the cooler months of the year in Adelaide and a relatively wet time of year, so plan for around 14.9°C daytime highs and 6.6°C at night.
Not quite — August is the 2nd coolest month in Adelaide, averaging 10.8°C.
For August in Adelaide, pack warm layers and a jacket for chilly mornings, with typical highs of 14.9°C and lows of 6.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 77% — quite humid.
Average wind speed in August is 2.6 m/s. The windiest August on record averaged 3.6 m/s (1991).
The wettest August on record was 1992 with 114 mm. On average, August sees 57 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 August, 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 August specifically, along with year-by-year records and how the month has changed over the decades.
