August is one of the cooler months of the year in Mount Gambier, with average highs near 13.7°C and lows around 8.9°C (mean 11.3°C). It is a relatively wet time of year, averaging 95 mm of rainfall and 80% relative humidity across the period.
August is one of the cooler months of the year in Mount Gambier. Across 45 years of records, the warmest August in Mount Gambier was 2024 — when the month averaged 13.4°C — while the coldest was 1989 at 10°C. Typical August days reach 13.7°C with nights near 8.9°C. The long-term trend is warming, about 0.2°C per decade.
August is a relatively wet time of year in Mount Gambier, averaging 95 mm of rainfall. The wettest August on record was 2013 with 200 mm, while the driest was 1982 at 27 mm.
Relative humidity in Mount Gambier during August averages 80%. The most humid August was 2011 at 84%, and the least humid was 2018 at 75%.
August receives about 2.9 kWh/m²/day of solar energy in Mount Gambier. The sunniest August was 2025 at 3.2 kWh/m²/day, and the cloudiest were 2010 and 2022 at 2.6.
Average wind speed in Mount Gambier during August is 4.4 m/s. The windiest August was 1991 at 6.1 m/s, while the calmest were 1982 and 2014 at 3.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 10.9°C | 11.1°C | 11.3°C | 11.3°C | 12.0°C | +1.1°C |
| Avg High | 13.4°C | 13.5°C | 13.7°C | 13.6°C | 14.4°C | +1°C |
| Avg Low | 8.5°C | 8.6°C | 8.9°C | 9.0°C | 9.6°C | +1.1°C |
| Avg Rain | 105 mm | 100 mm | 100 mm | 92 mm | 67 mm | -38 mm |
August temperatures in Mount Gambier have risen by about 1.1°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 3.8°C (1982) to a record high of 20.6°C (2023).
Rainfall in August is a relatively wet time of year, averaging 95 mm, with a wettest year of 200 mm.
A quieter season to visit Mount Gambier
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Mount Gambier. That said, August — with days averaging 13.7°C and nights around 8.9°C (mean 11.3°C) and higher rainfall (95 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 | 14.4°C | 11.8°C | 9.1°C | 17.7°C | 5.3°C | 73 mm | 76% | 4.1 m/s | 3.2 |
| 2024 🔥 | 16.1°C | 13.4°C | 10.7°C | 19.9°C | 6.9°C | 55 mm | 78% | 4.7 m/s | 2.9 |
| 2023 | 14.7°C | 12.2°C | 9.8°C | 20.6°C | 5.5°C | 36 mm | 79% | 3.7 m/s | 3.1 |
| 2022 | 13.8°C | 11.6°C | 9.4°C | 18.2°C | 6.6°C | 121 mm | 80% | 4.3 m/s | 2.6 |
| 2021 | 14.0°C | 11.8°C | 9.7°C | 17.4°C | 6.3°C | 57 mm | 81% | 4.5 m/s | 3.1 |
| 2020 | 13.3°C | 11.0°C | 8.7°C | 19.0°C | 6.6°C | 59 mm | 79% | 4.4 m/s | 3 |
| 2019 | 13.3°C | 10.9°C | 8.6°C | 17.3°C | 4.6°C | 56 mm | 77% | 4.4 m/s | 2.9 |
| 2018 | 13.9°C | 11.5°C | 9.1°C | 17.2°C | 5.1°C | 80 mm | 75% | 5 m/s | 2.9 |
| 2017 | 13.6°C | 11.2°C | 8.9°C | 18.1°C | 5.4°C | 87 mm | 78% | 4.4 m/s | 2.9 |
| 2016 | 14.0°C | 11.5°C | 9.1°C | 20.3°C | 6.3°C | 78 mm | 78% | 4 m/s | 3 |
| 2015 | 12.8°C | 10.7°C | 8.7°C | 18.3°C | 5.3°C | 35 mm | 78% | 4.1 m/s | 2.9 |
| 2014 | 13.9°C | 11.2°C | 8.5°C | 18.7°C | 4.1°C | 30 mm | 80% | 3.1 m/s | 3.1 |
| 2013 🌧️ | 14.1°C | 12.1°C | 10.1°C | 18.3°C | 8.4°C | 200 mm | 82% | 5.6 m/s | 2.8 |
| 2012 | 12.9°C | 10.9°C | 8.9°C | 16.1°C | 7.4°C | 108 mm | 80% | 5.2 m/s | 2.8 |
| 2011 | 14.7°C | 12.1°C | 9.5°C | 19.3°C | 6.5°C | 97 mm | 84% | 3.8 m/s | 3 |
| 2010 | 12.6°C | 10.7°C | 8.8°C | 16.3°C | 5.7°C | 151 mm | 80% | 5.1 m/s | 2.6 |
| 2009 | 14.3°C | 12.1°C | 9.8°C | 18.5°C | 5.8°C | 116 mm | 81% | 5.3 m/s | 2.9 |
| 2008 | 12.4°C | 10.5°C | 8.7°C | 15.8°C | 6.5°C | 118 mm | 80% | 4.2 m/s | 2.8 |
| 2007 | 14.4°C | 11.7°C | 9.1°C | 20.0°C | 4.2°C | 79 mm | 81% | 4.4 m/s | 3 |
| 2006 | 14.6°C | 11.7°C | 8.8°C | 19.0°C | 6.7°C | 43 mm | 77% | 3.7 m/s | 3.1 |
| 2005 | 14.1°C | 11.7°C | 9.4°C | 17.9°C | 7.5°C | 95 mm | 77% | 4.7 m/s | 2.7 |
| 2004 | 13.5°C | 11.2°C | 8.9°C | 18.2°C | 5.8°C | 152 mm | 82% | 4 m/s | 2.8 |
| 2003 | 12.9°C | 10.5°C | 8.1°C | 15.5°C | 4.1°C | 107 mm | 79% | 4.8 m/s | 2.7 |
| 2002 | 13.5°C | 11.0°C | 8.4°C | 17.4°C | 4.3°C | 68 mm | 77% | 3.8 m/s | 2.9 |
| 2001 | 14.2°C | 11.7°C | 9.3°C | 18.2°C | 6.2°C | 133 mm | 78% | 5 m/s | 2.7 |
| 2000 | 13.5°C | 10.8°C | 8.0°C | 17.0°C | 5.2°C | 89 mm | 83% | 3.6 m/s | 2.9 |
| 1999 | 14.6°C | 11.8°C | 9.1°C | 19.2°C | 6.4°C | 59 mm | 78% | 3.6 m/s | 3 |
| 1998 | 14.3°C | 11.3°C | 8.3°C | 17.4°C | 4.4°C | 52 mm | 83% | 3.5 m/s | 2.9 |
| 1997 | 13.2°C | 10.9°C | 8.7°C | 17.0°C | 4.0°C | 92 mm | 77% | 4.4 m/s | 2.8 |
| 1996 | 13.0°C | 10.9°C | 8.9°C | 16.0°C | 6.7°C | 144 mm | 82% | 4.7 m/s | 2.9 |
| 1995 | 14.0°C | 11.1°C | 8.2°C | 19.3°C | 4.7°C | 70 mm | 81% | 4.5 m/s | 3.1 |
| 1994 | 12.6°C | 10.5°C | 8.4°C | 18.7°C | 4.6°C | 56 mm | 77% | 4.2 m/s | 3.1 |
| 1993 | 15.1°C | 12.3°C | 9.4°C | 19.5°C | 4.7°C | 84 mm | 78% | 4.5 m/s | 3 |
| 1992 | 12.9°C | 10.4°C | 7.8°C | 17.0°C | 5.4°C | 128 mm | 81% | 4.9 m/s | 3 |
| 1991 | 13.2°C | 11.2°C | 9.2°C | 16.7°C | 5.3°C | 151 mm | 78% | 6.1 m/s | 2.9 |
| 1990 | 12.4°C | 10.3°C | 8.2°C | 15.6°C | 4.1°C | 158 mm | 81% | 4.7 m/s | 2.9 |
| 1989 ❄️ | 12.1°C | 10.0°C | 7.9°C | 14.6°C | 4.4°C | 138 mm | 83% | 4.3 m/s | 2.8 |
| 1988 | 13.8°C | 11.5°C | 9.3°C | 17.9°C | 6.0°C | 102 mm | 81% | 4.2 m/s | 2.8 |
| 1987 | 13.3°C | 10.8°C | 8.3°C | 17.3°C | 6.3°C | 54 mm | 82% | 3.8 m/s | 2.9 |
| 1986 | 13.4°C | 10.8°C | 8.2°C | 18.1°C | 4.8°C | 113 mm | 83% | 4.1 m/s | 3 |
| 1985 | 13.1°C | 10.6°C | 8.0°C | 17.9°C | 4.2°C | 95 mm | 82% | 4 m/s | 2.9 |
| 1984 | 13.2°C | 11.2°C | 9.2°C | 16.3°C | 7.1°C | 149 mm | 82% | 4.9 m/s | 2.9 |
| 1983 | 14.0°C | 11.5°C | 9.0°C | 17.7°C | 4.8°C | 93 mm | 82% | 4.1 m/s | — |
| 1982 | 14.8°C | 11.4°C | 8.0°C | 18.9°C | 3.8°C | 27 mm | 79% | 3.1 m/s | — |
| 1981 | 12.9°C | 10.7°C | 8.5°C | 15.7°C | 5.0°C | 174 mm | 81% | 5 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 13.7°C with lows near 8.9°C (mean 11.3°C), based on 45 years of NASA POWER data.
August averages 95 mm of rainfall in Mount Gambier, a relatively wet time of year. The wettest on record was 200 mm in 2013.
The hottest August reached 20.6°C in 2023. The coldest dipped to 3.8°C in 1982.
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 13.6°C to 14.6°C and overnight lows from 8.5°C to 9.7°C over the same span.
August is one of the cooler months of the year in Mount Gambier and a relatively wet time of year, so plan for around 13.7°C daytime highs and 8.9°C at night.
Not quite — August is the 2nd coolest month in Mount Gambier, averaging 11.3°C.
For August in Mount Gambier, pack light layers you can adjust through the day, with typical highs of 13.7°C and lows of 8.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 80% — quite humid.
Average wind speed in August is 4.4 m/s. The windiest August on record averaged 6.1 m/s (1991).
The wettest August on record was 2013 with 200 mm. On average, August sees 95 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 Gambier 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.
