August is one of the cooler months of the year in Mount Barker, with average highs near 14.7°C and lows around 6.2°C (mean 10.5°C). It is a relatively wet time of year, averaging 84 mm of rainfall and 85% relative humidity across the period.
August is one of the cooler months of the year in Mount Barker. Across 45 years of records, the warmest August in Mount Barker was 2006 — when the month averaged 12°C — while the coldest was 1990 at 8.9°C. Typical August days reach 14.7°C with nights near 6.2°C. The long-term trend is warming, about 0.2°C per decade.
August is a relatively wet time of year in Mount Barker, averaging 84 mm of rainfall. The wettest August on record was 1992 with 148 mm, while the driest was 1987 at 41 mm.
Relative humidity in Mount Barker during August averages 85%. The most humid August was 1992 at 89%, and the least humid was 2019 at 81%.
August receives about 3.3 kWh/m²/day of solar energy in Mount Barker. The sunniest August was 2008 at 3.6 kWh/m²/day, and the cloudiest was 2013 at 3.
Average wind speed in Mount Barker during August is 3.3 m/s. The windiest August was 2024 at 4.2 m/s, while the calmest was 2023 at 2.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 10.1°C | 10.2°C | 10.5°C | 10.8°C | 10.9°C | +0.8°C |
| Avg High | 14.5°C | 14.4°C | 14.6°C | 15.2°C | 15.0°C | +0.5°C |
| Avg Low | 5.7°C | 6.0°C | 6.3°C | 6.4°C | 6.7°C | +1°C |
| Avg Rain | 74 mm | 83 mm | 77 mm | 95 mm | 93 mm | +19 mm |
August temperatures in Mount Barker have risen by about 0.5°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 0°C (1982) to a record high of 23.9°C (2015).
Rainfall in August is a relatively wet time of year, averaging 84 mm, with a wettest year of 148 mm.
A quieter season to visit Mount Barker
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Mount Barker. That said, August — with days averaging 14.7°C and nights around 6.2°C (mean 10.5°C) and higher rainfall (84 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 | 14.7°C | 10.5°C | 6.3°C | 21.3°C | 3.4°C | 82 mm | 86% | 3.4 m/s | 3.5 |
| 2024 | 15.4°C | 11.6°C | 7.8°C | 20.4°C | 3.4°C | 117 mm | 86% | 4.2 m/s | 3.2 |
| 2023 | 16.3°C | 11.4°C | 6.4°C | 22.3°C | 0.4°C | 74 mm | 87% | 2.5 m/s | 3.3 |
| 2022 | 14.2°C | 10.1°C | 6.1°C | 19.0°C | 3.2°C | 95 mm | 84% | 3.4 m/s | 3.2 |
| 2021 | 15.0°C | 10.8°C | 6.7°C | 21.1°C | 3.8°C | 74 mm | 87% | 3.3 m/s | 3.4 |
| 2020 | 14.6°C | 10.7°C | 6.7°C | 22.0°C | 1.9°C | 115 mm | 86% | 3.3 m/s | 3.3 |
| 2019 | 16.1°C | 11.3°C | 6.4°C | 22.8°C | 2.6°C | 103 mm | 81% | 3 m/s | 3.5 |
| 2018 | 14.4°C | 10.2°C | 6.1°C | 21.5°C | 0.3°C | 143 mm | 86% | 3.5 m/s | 3.2 |
| 2017 | 14.4°C | 10.5°C | 6.6°C | 19.7°C | 1.8°C | 114 mm | 87% | 3.6 m/s | 3.2 |
| 2016 | 13.2°C | 9.3°C | 5.4°C | 18.0°C | 2.2°C | 121 mm | 87% | 3.4 m/s | 3.2 |
| 2015 | 15.2°C | 11.0°C | 6.7°C | 23.9°C | 2.8°C | 96 mm | 86% | 2.8 m/s | 3.1 |
| 2014 | 16.7°C | 11.8°C | 6.8°C | 21.2°C | 2.0°C | 52 mm | 83% | 2.9 m/s | 3.4 |
| 2013 | 15.6°C | 11.7°C | 7.8°C | 19.7°C | 4.7°C | 107 mm | 89% | 3.6 m/s | 3 |
| 2012 | 15.4°C | 10.6°C | 5.9°C | 20.5°C | 2.6°C | 66 mm | 83% | 3.2 m/s | 3.3 |
| 2011 | 15.9°C | 11.4°C | 6.9°C | 22.7°C | 4.0°C | 85 mm | 85% | 3.4 m/s | 3.5 |
| 2010 | 15.0°C | 10.4°C | 5.8°C | 20.5°C | 2.9°C | 64 mm | 83% | 2.6 m/s | 3.2 |
| 2009 | 14.5°C | 10.5°C | 6.4°C | 17.7°C | 3.5°C | 68 mm | 88% | 3.6 m/s | 3.1 |
| 2008 | 14.5°C | 9.7°C | 4.9°C | 20.2°C | 1.6°C | 43 mm | 83% | 2.6 m/s | 3.6 |
| 2007 | 15.6°C | 11.4°C | 7.2°C | 20.3°C | 2.1°C | 73 mm | 84% | 3.7 m/s | 3.2 |
| 2006 🔥 | 16.9°C | 12.0°C | 7.2°C | 23.7°C | 2.7°C | 63 mm | 83% | 3.7 m/s | 3.4 |
| 2005 | 14.3°C | 10.2°C | 6.2°C | 18.8°C | 2.5°C | 83 mm | 87% | 3.3 m/s | 3.2 |
| 2004 | 13.6°C | 9.9°C | 6.2°C | 17.6°C | 2.8°C | 88 mm | 85% | 3.7 m/s | 3.2 |
| 2003 | 14.0°C | 10.2°C | 6.3°C | 17.4°C | 1.3°C | 117 mm | 86% | 3.2 m/s | 3.2 |
| 2002 | 14.6°C | 10.3°C | 6.0°C | 18.2°C | 2.2°C | 70 mm | 85% | 3.2 m/s | 3.1 |
| 2001 | 14.9°C | 10.7°C | 6.6°C | 20.2°C | 3.4°C | 81 mm | 84% | 3.1 m/s | 3.1 |
| 2000 | 13.5°C | 9.6°C | 5.6°C | 18.2°C | 3.2°C | 84 mm | 85% | 3.5 m/s | 3.2 |
| 1999 | 14.7°C | 10.5°C | 6.3°C | 20.3°C | 3.0°C | 65 mm | 83% | 3.3 m/s | 3.4 |
| 1998 | 15.6°C | 11.6°C | 7.6°C | 22.7°C | 4.0°C | 103 mm | 87% | 3.5 m/s | 3.1 |
| 1997 | 14.4°C | 10.2°C | 6.0°C | 18.3°C | 2.0°C | 92 mm | 87% | 2.9 m/s | 3.2 |
| 1996 | 14.1°C | 9.9°C | 5.6°C | 21.5°C | 0.6°C | 82 mm | 85% | 3.6 m/s | 3.3 |
| 1995 | 15.6°C | 11.2°C | 6.7°C | 20.7°C | 2.1°C | 51 mm | 82% | 3.7 m/s | 3.5 |
| 1994 | 15.4°C | 10.6°C | 5.7°C | 23.7°C | 1.8°C | 88 mm | 84% | 2.7 m/s | 3.3 |
| 1993 | 13.9°C | 9.7°C | 5.4°C | 18.5°C | 2.5°C | 83 mm | 86% | 3.5 m/s | 3.3 |
| 1992 🌧️ | 12.9°C | 9.4°C | 5.9°C | 17.0°C | 2.8°C | 148 mm | 89% | 3.8 m/s | 3.1 |
| 1991 | 14.1°C | 9.8°C | 5.6°C | 19.9°C | 2.2°C | 71 mm | 86% | 3.4 m/s | 3.3 |
| 1990 ❄️ | 13.0°C | 8.9°C | 4.8°C | 16.9°C | 1.1°C | 49 mm | 86% | 3.4 m/s | 3.4 |
| 1989 | 14.0°C | 9.6°C | 5.2°C | 19.7°C | 1.7°C | 71 mm | 83% | 3 m/s | 3.3 |
| 1988 | 14.3°C | 9.9°C | 5.4°C | 19.7°C | 2.1°C | 67 mm | 87% | 3.3 m/s | 3.2 |
| 1987 | 15.4°C | 10.2°C | 5.1°C | 21.1°C | 2.1°C | 41 mm | 82% | 2.6 m/s | 3.3 |
| 1986 | 13.4°C | 9.2°C | 5.0°C | 18.9°C | 0.8°C | 75 mm | 86% | 3.3 m/s | 3.3 |
| 1985 | 14.4°C | 10.5°C | 6.6°C | 19.1°C | 2.9°C | 96 mm | 86% | 3.7 m/s | 3.2 |
| 1984 | 13.3°C | 9.7°C | 6.1°C | 19.4°C | 3.7°C | 103 mm | 87% | 3.8 m/s | 3.4 |
| 1983 | 15.5°C | 11.3°C | 7.2°C | 20.8°C | 2.0°C | 70 mm | 84% | 3.9 m/s | — |
| 1982 | 16.3°C | 10.7°C | 5.1°C | 22.9°C | 0.0°C | 66 mm | 82% | 2.7 m/s | — |
| 1981 | 13.6°C | 9.6°C | 5.6°C | 16.8°C | 0.6°C | 78 mm | 86% | 4 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 14.7°C with lows near 6.2°C (mean 10.5°C), based on 45 years of NASA POWER data.
August averages 84 mm of rainfall in Mount Barker, a relatively wet time of year. The wettest on record was 148 mm in 1992.
The hottest August reached 23.9°C in 2015. The coldest dipped to 0°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 0.5°C. Daytime highs moved from 14.6°C to 15.1°C and overnight lows from 6.1°C to 6.7°C over the same span.
August is one of the cooler months of the year in Mount Barker and a relatively wet time of year, so plan for around 14.7°C daytime highs and 6.2°C at night.
Not quite — August is the 2nd coolest month in Mount Barker, averaging 10.5°C.
For August in Mount Barker, pack warm layers and a jacket for chilly mornings, with typical highs of 14.7°C and lows of 6.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 85% — quite humid.
Average wind speed in August is 3.3 m/s. The windiest August on record averaged 4.2 m/s (2024).
The wettest August on record was 1992 with 148 mm. On average, August sees 84 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 Mount Barker 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.
