August is one of the cooler months of the year in Colac, with average highs near 12.8°C and lows around 7.4°C (mean 10.1°C). It is a relatively wet time of year, averaging 81 mm of rainfall and 82% relative humidity across the period.
August is one of the cooler months of the year in Colac. Across 45 years of records, the warmest August in Colac was 2024 — when the month averaged 12.7°C — while the coldest was 1989 at 8.8°C. Typical August days reach 12.8°C with nights near 7.4°C. The long-term trend is warming, about 0.2°C per decade.
August is a relatively wet time of year in Colac, averaging 81 mm of rainfall. The wettest August on record was 2010 with 186 mm, while the driest was 2023 at 21 mm.
Relative humidity in Colac during August averages 82%. The most humid August was 1996 at 87%, and the least humid was 2024 at 74%.
August receives about 2.7 kWh/m²/day of solar energy in Colac. The sunniest August was 1995 at 3 kWh/m²/day, and the cloudiest were 2001, 2010 and 2013, among others at 2.5.
Average wind speed in Colac during August is 2.7 m/s. The windiest August was 1991 at 3.5 m/s, while the calmest was 2014 at 2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 9.9°C | 9.7°C | 10.3°C | 10.0°C | 11.1°C | +1.2°C |
| Avg High | 12.6°C | 12.4°C | 13.0°C | 12.6°C | 13.9°C | +1.3°C |
| Avg Low | 7.1°C | 7.1°C | 7.5°C | 7.4°C | 8.3°C | +1.2°C |
| Avg Rain | 83 mm | 93 mm | 91 mm | 83 mm | 43 mm | -40 mm |
August temperatures in Colac have risen by about 1.2°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 3.1°C (2014) to a record high of 21°C (2024).
Rainfall in August is a relatively wet time of year, averaging 81 mm, with a wettest year of 186 mm.
A quieter season to visit Colac
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Colac. That said, August — with days averaging 12.8°C and nights around 7.4°C (mean 10.1°C) and higher rainfall (81 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 | 13.7°C | 10.8°C | 7.9°C | 17.8°C | 4.6°C | 46 mm | 79% | 2.4 m/s | 2.9 |
| 2024 🔥 | 15.9°C | 12.7°C | 9.5°C | 21.0°C | 5.0°C | 26 mm | 74% | 2.6 m/s | 2.8 |
| 2023 | 14.2°C | 11.4°C | 8.6°C | 19.6°C | 4.5°C | 21 mm | 79% | 2.4 m/s | 2.7 |
| 2022 | 13.5°C | 10.8°C | 8.2°C | 17.6°C | 4.4°C | 72 mm | 81% | 2.7 m/s | 2.6 |
| 2021 | 13.4°C | 10.8°C | 8.2°C | 17.7°C | 5.8°C | 30 mm | 81% | 2.8 m/s | 2.9 |
| 2020 | 12.6°C | 10.0°C | 7.4°C | 17.8°C | 4.7°C | 62 mm | 82% | 2.9 m/s | 2.8 |
| 2019 | 12.2°C | 9.5°C | 6.9°C | 16.1°C | 5.2°C | 57 mm | 82% | 2.8 m/s | 2.6 |
| 2018 | 12.6°C | 9.8°C | 7.1°C | 15.9°C | 4.5°C | 61 mm | 78% | 3.1 m/s | 2.8 |
| 2017 | 12.5°C | 10.0°C | 7.5°C | 16.8°C | 5.5°C | 62 mm | 81% | 2.8 m/s | 2.8 |
| 2016 | 13.3°C | 10.3°C | 7.4°C | 18.4°C | 5.7°C | 59 mm | 82% | 2.5 m/s | 2.6 |
| 2015 | 11.9°C | 9.5°C | 7.2°C | 16.3°C | 5.1°C | 33 mm | 80% | 2.6 m/s | 2.6 |
| 2014 | 13.0°C | 10.3°C | 7.5°C | 17.8°C | 3.1°C | 56 mm | 84% | 2 m/s | 2.9 |
| 2013 | 12.9°C | 10.6°C | 8.3°C | 18.0°C | 5.7°C | 166 mm | 86% | 3.4 m/s | 2.5 |
| 2012 | 12.2°C | 9.7°C | 7.2°C | 16.0°C | 5.5°C | 103 mm | 83% | 3.1 m/s | 2.7 |
| 2011 | 14.0°C | 11.1°C | 8.2°C | 18.2°C | 5.9°C | 43 mm | 83% | 2.2 m/s | 2.7 |
| 2010 🌧️ | 11.5°C | 9.3°C | 7.1°C | 14.7°C | 4.8°C | 186 mm | 85% | 3 m/s | 2.5 |
| 2009 | 13.6°C | 10.8°C | 8.1°C | 17.4°C | 4.5°C | 112 mm | 81% | 3.4 m/s | 2.6 |
| 2008 | 11.6°C | 9.3°C | 6.9°C | 14.6°C | 4.4°C | 101 mm | 85% | 2.6 m/s | 2.6 |
| 2007 | 13.5°C | 10.7°C | 7.9°C | 19.3°C | 5.2°C | 71 mm | 82% | 2.7 m/s | 2.8 |
| 2006 | 13.7°C | 10.6°C | 7.5°C | 18.4°C | 5.0°C | 41 mm | 79% | 2.2 m/s | 2.9 |
| 2005 | 13.6°C | 10.8°C | 7.9°C | 19.9°C | 5.5°C | 93 mm | 78% | 3.1 m/s | 2.8 |
| 2004 | 12.8°C | 10.1°C | 7.5°C | 17.6°C | 4.1°C | 98 mm | 83% | 2.6 m/s | 2.6 |
| 2003 | 12.2°C | 9.5°C | 6.9°C | 15.0°C | 4.8°C | 114 mm | 80% | 3 m/s | 2.7 |
| 2002 | 12.8°C | 10.0°C | 7.2°C | 16.0°C | 5.3°C | 69 mm | 81% | 2.4 m/s | 2.6 |
| 2001 | 13.1°C | 10.5°C | 7.9°C | 16.6°C | 5.9°C | 131 mm | 81% | 3.1 m/s | 2.5 |
| 2000 | 13.0°C | 10.3°C | 7.5°C | 17.0°C | 6.0°C | 75 mm | 83% | 2.2 m/s | 2.7 |
| 1999 | 13.8°C | 10.9°C | 8.1°C | 20.3°C | 5.6°C | 81 mm | 84% | 2.4 m/s | 2.6 |
| 1998 | 13.2°C | 10.5°C | 7.8°C | 16.5°C | 5.3°C | 40 mm | 84% | 2.3 m/s | 2.8 |
| 1997 | 12.3°C | 9.6°C | 6.9°C | 16.1°C | 3.2°C | 83 mm | 81% | 2.7 m/s | 2.5 |
| 1996 | 11.8°C | 9.5°C | 7.2°C | 16.0°C | 4.6°C | 109 mm | 87% | 2.9 m/s | 2.5 |
| 1995 | 13.0°C | 9.9°C | 6.8°C | 18.2°C | 4.2°C | 73 mm | 84% | 2.7 m/s | 3 |
| 1994 | 11.5°C | 9.1°C | 6.7°C | 17.7°C | 4.0°C | 66 mm | 82% | 2.7 m/s | 2.9 |
| 1993 | 13.9°C | 10.9°C | 7.9°C | 18.0°C | 3.9°C | 89 mm | 81% | 2.8 m/s | 2.9 |
| 1992 | 11.5°C | 8.9°C | 6.2°C | 15.7°C | 4.5°C | 130 mm | 84% | 2.9 m/s | 2.7 |
| 1991 | 11.7°C | 9.2°C | 6.7°C | 14.8°C | 5.0°C | 145 mm | 85% | 3.5 m/s | 2.7 |
| 1990 | 11.1°C | 8.9°C | 6.8°C | 14.2°C | 4.4°C | 114 mm | 86% | 2.9 m/s | 2.7 |
| 1989 ❄️ | 11.4°C | 8.8°C | 6.1°C | 14.4°C | 4.2°C | 115 mm | 86% | 2.5 m/s | 2.8 |
| 1988 | 13.0°C | 10.4°C | 7.8°C | 17.4°C | 5.6°C | 81 mm | 84% | 2.6 m/s | 2.7 |
| 1987 | 12.5°C | 9.7°C | 6.9°C | 15.6°C | 5.5°C | 63 mm | 85% | 2.3 m/s | 2.7 |
| 1986 | 12.2°C | 9.6°C | 7.0°C | 16.9°C | 5.2°C | 70 mm | 85% | 2.5 m/s | 2.9 |
| 1985 | 12.3°C | 9.6°C | 7.0°C | 15.9°C | 3.2°C | 90 mm | 84% | 2.6 m/s | 2.7 |
| 1984 | 12.2°C | 9.8°C | 7.4°C | 15.1°C | 5.4°C | 100 mm | 86% | 3.1 m/s | 2.8 |
| 1983 | 13.1°C | 10.5°C | 7.8°C | 16.4°C | 3.5°C | 75 mm | 84% | 2.6 m/s | — |
| 1982 | 15.0°C | 11.2°C | 7.4°C | 20.3°C | 4.2°C | 25 mm | 77% | 2.1 m/s | — |
| 1981 | 11.9°C | 9.4°C | 6.9°C | 15.3°C | 4.9°C | 130 mm | 85% | 3 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 12.8°C with lows near 7.4°C (mean 10.1°C), based on 45 years of NASA POWER data.
August averages 81 mm of rainfall in Colac, a relatively wet time of year. The wettest on record was 186 mm in 2010.
The hottest August reached 21°C in 2024. The coldest dipped to 3.1°C in 2014.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.2°C. Daytime highs moved from 12.9°C to 14.1°C and overnight lows from 7.3°C to 8.5°C over the same span.
August is one of the cooler months of the year in Colac and a relatively wet time of year, so plan for around 12.8°C daytime highs and 7.4°C at night.
Not quite — August is the 2nd coolest month in Colac, averaging 10.1°C.
For August in Colac, pack warm layers and a jacket for chilly mornings, with typical highs of 12.8°C and lows of 7.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 82% — quite humid.
Average wind speed in August is 2.7 m/s. The windiest August on record averaged 3.5 m/s (1991).
The wettest August on record was 2010 with 186 mm. On average, August sees 81 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 Colac 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.
