August is one of the cooler months of the year in Wonthaggi, with average highs near 13.1°C and lows around 8.1°C (mean 10.6°C). It is a relatively wet time of year, averaging 90 mm of rainfall and 81% relative humidity across the period.
August is one of the cooler months of the year in Wonthaggi. Across 45 years of records, the warmest August in Wonthaggi was 2024 — when the month averaged 12.9°C — while the coldest were 1989 and 1992 at 9.2°C. Typical August days reach 13.1°C with nights near 8.1°C. The long-term trend is warming, about 0.3°C per decade.
August is a relatively wet time of year in Wonthaggi, averaging 90 mm of rainfall. The wettest August on record was 1991 with 161 mm, while the driest was 2024 at 29 mm.
Relative humidity in Wonthaggi during August averages 81%. The most humid August was 1989 at 86%, and the least humid was 2018 at 74%.
August receives about 2.8 kWh/m²/day of solar energy in Wonthaggi. The sunniest Augusts were 1998, 2014 and 2025, among others at 3.1 kWh/m²/day, and the cloudiest was 2013 at 2.5.
Average wind speed in Wonthaggi during August is 1.8 m/s. The windiest August was 1991 at 2.5 m/s, while the calmest was 2011 at 1.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 10.2°C | 10.2°C | 10.9°C | 10.6°C | 11.5°C | +1.3°C |
| Avg High | 12.7°C | 12.7°C | 13.4°C | 13.1°C | 14.2°C | +1.5°C |
| Avg Low | 7.7°C | 7.7°C | 8.3°C | 8.2°C | 8.8°C | +1.1°C |
| Avg Rain | 88 mm | 102 mm | 97 mm | 87 mm | 64 mm | -24 mm |
August temperatures in Wonthaggi have risen by about 1.4°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 3.2°C (1992) to a record high of 20.4°C (2024).
Rainfall in August is a relatively wet time of year, averaging 90 mm, with a wettest year of 161 mm.
A quieter season to visit Wonthaggi
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Wonthaggi. That said, August — with days averaging 13.1°C and nights around 8.1°C (mean 10.6°C) and higher rainfall (90 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 | 11.3°C | 8.2°C | 18.4°C | 3.7°C | 56 mm | 78% | 1.6 m/s | 3.1 |
| 2024 🔥 | 15.9°C | 12.9°C | 9.8°C | 20.4°C | 5.7°C | 29 mm | 75% | 1.6 m/s | 3 |
| 2023 | 14.9°C | 12.0°C | 9.2°C | 19.6°C | 4.2°C | 34 mm | 77% | 1.5 m/s | 2.8 |
| 2022 | 13.8°C | 11.3°C | 8.9°C | 18.0°C | 5.4°C | 126 mm | 81% | 1.7 m/s | 2.6 |
| 2021 | 13.6°C | 11.2°C | 8.8°C | 17.9°C | 5.8°C | 58 mm | 80% | 1.8 m/s | 3 |
| 2020 | 12.6°C | 10.3°C | 8.0°C | 16.5°C | 5.0°C | 79 mm | 81% | 1.9 m/s | 2.9 |
| 2019 | 12.8°C | 10.3°C | 7.8°C | 17.0°C | 4.2°C | 88 mm | 79% | 2 m/s | 2.7 |
| 2018 | 13.4°C | 10.6°C | 7.9°C | 17.4°C | 4.0°C | 79 mm | 74% | 2.1 m/s | 2.9 |
| 2017 | 12.9°C | 10.6°C | 8.4°C | 17.2°C | 5.8°C | 90 mm | 77% | 1.9 m/s | 2.8 |
| 2016 | 13.9°C | 11.0°C | 8.2°C | 18.3°C | 4.6°C | 69 mm | 79% | 1.7 m/s | 2.9 |
| 2015 | 12.4°C | 10.2°C | 7.9°C | 16.1°C | 4.9°C | 52 mm | 78% | 1.7 m/s | 2.7 |
| 2014 | 13.4°C | 10.7°C | 7.9°C | 17.6°C | 5.0°C | 47 mm | 82% | 1.5 m/s | 3.1 |
| 2013 | 13.4°C | 11.3°C | 9.2°C | 17.9°C | 6.9°C | 158 mm | 82% | 2.3 m/s | 2.5 |
| 2012 | 12.4°C | 10.3°C | 8.3°C | 15.8°C | 5.2°C | 107 mm | 81% | 2.1 m/s | 2.8 |
| 2011 | 14.2°C | 11.4°C | 8.7°C | 17.8°C | 5.7°C | 50 mm | 84% | 1.3 m/s | 2.8 |
| 2010 | 12.0°C | 9.8°C | 7.5°C | 14.2°C | 5.0°C | 135 mm | 84% | 2 m/s | 2.7 |
| 2009 | 14.2°C | 11.6°C | 9.1°C | 17.5°C | 6.2°C | 96 mm | 77% | 2.3 m/s | 2.7 |
| 2008 | 12.1°C | 9.9°C | 7.7°C | 15.8°C | 4.8°C | 114 mm | 83% | 1.8 m/s | 2.7 |
| 2007 | 13.9°C | 11.3°C | 8.6°C | 18.9°C | 6.2°C | 81 mm | 82% | 1.8 m/s | 2.9 |
| 2006 | 13.8°C | 11.0°C | 8.2°C | 18.1°C | 6.0°C | 37 mm | 78% | 1.5 m/s | 3 |
| 2005 | 14.1°C | 11.5°C | 9.0°C | 18.1°C | 5.2°C | 125 mm | 76% | 2.1 m/s | 2.8 |
| 2004 | 13.3°C | 10.7°C | 8.1°C | 18.5°C | 3.9°C | 98 mm | 82% | 1.7 m/s | 2.8 |
| 2003 | 12.6°C | 10.1°C | 7.7°C | 15.0°C | 3.2°C | 109 mm | 78% | 2 m/s | 2.8 |
| 2002 | 13.6°C | 10.8°C | 8.1°C | 16.8°C | 5.0°C | 46 mm | 78% | 1.7 m/s | 2.8 |
| 2001 | 13.5°C | 11.1°C | 8.7°C | 17.0°C | 5.5°C | 160 mm | 79% | 2.1 m/s | 2.6 |
| 2000 | 13.3°C | 10.6°C | 7.9°C | 16.5°C | 4.9°C | 101 mm | 85% | 1.5 m/s | 2.9 |
| 1999 | 13.9°C | 11.4°C | 8.8°C | 19.4°C | 6.0°C | 101 mm | 84% | 1.5 m/s | 2.6 |
| 1998 | 13.7°C | 10.9°C | 8.1°C | 16.4°C | 4.2°C | 36 mm | 83% | 1.5 m/s | 3.1 |
| 1997 | 12.6°C | 10.2°C | 7.7°C | 16.6°C | 4.7°C | 92 mm | 78% | 1.9 m/s | 2.7 |
| 1996 | 12.0°C | 10.0°C | 7.9°C | 15.1°C | 5.2°C | 124 mm | 85% | 2 m/s | 2.6 |
| 1995 | 13.2°C | 10.3°C | 7.4°C | 18.3°C | 4.6°C | 72 mm | 83% | 1.7 m/s | 3.1 |
| 1994 | 12.0°C | 9.6°C | 7.2°C | 17.9°C | 3.6°C | 87 mm | 79% | 1.9 m/s | 2.9 |
| 1993 | 14.1°C | 11.3°C | 8.5°C | 17.8°C | 3.6°C | 98 mm | 80% | 1.9 m/s | 2.9 |
| 1992 | 11.8°C | 9.2°C | 6.7°C | 14.9°C | 3.2°C | 116 mm | 83% | 2 m/s | 2.7 |
| 1991 🌧️ | 11.8°C | 9.7°C | 7.6°C | 15.0°C | 4.9°C | 161 mm | 83% | 2.5 m/s | 2.7 |
| 1990 | 11.5°C | 9.4°C | 7.3°C | 15.3°C | 3.7°C | 135 mm | 85% | 2 m/s | 2.8 |
| 1989 ❄️ | 11.5°C | 9.2°C | 6.9°C | 14.2°C | 5.2°C | 104 mm | 86% | 1.6 m/s | 2.8 |
| 1988 | 13.5°C | 10.8°C | 8.2°C | 18.0°C | 5.3°C | 87 mm | 83% | 1.7 m/s | 2.9 |
| 1987 | 12.9°C | 10.3°C | 7.7°C | 15.4°C | 5.3°C | 58 mm | 84% | 1.5 m/s | 2.9 |
| 1986 | 12.5°C | 9.8°C | 7.2°C | 16.2°C | 4.6°C | 65 mm | 85% | 1.6 m/s | 3.1 |
| 1985 | 12.2°C | 9.7°C | 7.2°C | 16.1°C | 3.4°C | 94 mm | 85% | 1.6 m/s | 2.9 |
| 1984 | 12.2°C | 10.2°C | 8.1°C | 15.4°C | 5.6°C | 129 mm | 84% | 2.1 m/s | 2.8 |
| 1983 | 13.2°C | 10.7°C | 8.3°C | 17.4°C | 4.5°C | 80 mm | 84% | 1.6 m/s | — |
| 1982 | 14.4°C | 11.1°C | 7.8°C | 18.9°C | 3.9°C | 32 mm | 80% | 1.4 m/s | — |
| 1981 | 12.0°C | 9.8°C | 7.5°C | 14.7°C | 5.4°C | 140 mm | 85% | 2 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 13.1°C with lows near 8.1°C (mean 10.6°C), based on 45 years of NASA POWER data.
August averages 90 mm of rainfall in Wonthaggi, a relatively wet time of year. The wettest on record was 161 mm in 1991.
The hottest August reached 20.4°C in 2024. The coldest dipped to 3.2°C in 1992.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.4°C. Daytime highs moved from 12.8°C to 14.5°C and overnight lows from 7.8°C to 9°C over the same span.
August is one of the cooler months of the year in Wonthaggi and a relatively wet time of year, so plan for around 13.1°C daytime highs and 8.1°C at night.
Not quite — August is the 2nd coolest month in Wonthaggi, averaging 10.6°C.
For August in Wonthaggi, pack light layers you can adjust through the day, with typical highs of 13.1°C and lows of 8.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 81% — quite humid.
Average wind speed in August is 1.8 m/s. The windiest August on record averaged 2.5 m/s (1991).
The wettest August on record was 1991 with 161 mm. On average, August sees 90 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 Wonthaggi 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.
