August is one of the cooler months of the year in Manjimup, with average highs near 14.6°C and lows around 6.4°C (mean 10.5°C). It is a relatively wet time of year, averaging 113 mm of rainfall and 86% relative humidity across the period.
August is one of the cooler months of the year in Manjimup. Across 45 years of records, the warmest August in Manjimup was 2014 — when the month averaged 11.9°C — while the coldest was 1990 at 8.9°C. Typical August days reach 14.6°C with nights near 6.4°C. The long-term trend is warming, about 0.3°C per decade.
August is a relatively wet time of year in Manjimup, averaging 113 mm of rainfall. The wettest Augusts on record were 1983 and 1985 with 160 mm, while the driest was 2008 at 39 mm.
Relative humidity in Manjimup during August averages 86%. The most humid August was 1992 at 89%, and the least humid was 2019 at 81%.
August receives about 3.1 kWh/m²/day of solar energy in Manjimup. The sunniest August was 2008 at 3.6 kWh/m²/day, and the cloudiest were 2007 and 2013 at 2.8.
Average wind speed in Manjimup during August is 3.2 m/s. The windiest August was 2024 at 4.1 m/s, while the calmest were 2010 and 2023 at 2.4 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 | 10.4°C | 11.0°C | 11.0°C | +0.9°C |
| Avg High | 14.3°C | 14.3°C | 14.4°C | 15.2°C | 15.1°C | +0.8°C |
| Avg Low | 5.9°C | 6.2°C | 6.4°C | 6.7°C | 6.9°C | +1°C |
| Avg Rain | 117 mm | 116 mm | 117 mm | 109 mm | 99 mm | -18 mm |
August temperatures in Manjimup have risen by about 0.7°C between 1981–1985 and 2021–2025.
August has ranged from a record low of -0.6°C (1981) to a record high of 23.2°C (2019).
Rainfall in August is a relatively wet time of year, averaging 113 mm, with a wettest year of 160 mm.
A quieter season to visit Manjimup
If your dates are flexible, the more temperate months of January and February tend to be the most comfortable for visiting Manjimup. That said, August — with days averaging 14.6°C and nights around 6.4°C (mean 10.5°C) and higher rainfall (113 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 | 14.9°C | 10.7°C | 6.5°C | 20.5°C | 3.0°C | 104 mm | 85% | 3.2 m/s | 3.3 |
| 2024 | 15.1°C | 11.8°C | 8.5°C | 19.8°C | 3.3°C | 148 mm | 86% | 4.1 m/s | 3 |
| 2023 | 16.3°C | 11.4°C | 6.6°C | 22.2°C | 0.8°C | 78 mm | 87% | 2.4 m/s | 3.2 |
| 2022 | 14.3°C | 10.3°C | 6.2°C | 18.7°C | 2.2°C | 107 mm | 85% | 3.2 m/s | 3 |
| 2021 | 15.1°C | 11.0°C | 6.9°C | 20.8°C | 2.1°C | 77 mm | 85% | 3.2 m/s | 3.3 |
| 2020 | 15.0°C | 10.8°C | 6.6°C | 19.7°C | 2.4°C | 78 mm | 85% | 3.1 m/s | 3.2 |
| 2019 | 16.3°C | 11.4°C | 6.4°C | 23.2°C | 2.9°C | 85 mm | 81% | 2.9 m/s | 3.4 |
| 2018 | 14.6°C | 10.5°C | 6.3°C | 21.5°C | 0.9°C | 129 mm | 86% | 3.4 m/s | 3.1 |
| 2017 | 14.7°C | 10.9°C | 7.1°C | 20.4°C | 2.3°C | 100 mm | 86% | 3.5 m/s | 3.1 |
| 2016 | 13.7°C | 9.6°C | 5.5°C | 17.6°C | 0.0°C | 113 mm | 85% | 3.4 m/s | 3 |
| 2015 | 15.1°C | 11.0°C | 6.8°C | 21.3°C | 3.9°C | 99 mm | 86% | 2.8 m/s | 3.1 |
| 2014 🔥 | 16.4°C | 11.9°C | 7.4°C | 20.2°C | 1.7°C | 118 mm | 86% | 3 m/s | 3.3 |
| 2013 | 15.4°C | 11.7°C | 8.1°C | 19.0°C | 5.0°C | 154 mm | 89% | 3.3 m/s | 2.8 |
| 2012 | 15.5°C | 10.8°C | 6.1°C | 19.5°C | 2.5°C | 100 mm | 83% | 2.9 m/s | 3.1 |
| 2011 | 15.7°C | 11.5°C | 7.3°C | 21.0°C | 2.2°C | 128 mm | 85% | 3.3 m/s | 3.2 |
| 2010 | 15.0°C | 10.3°C | 5.5°C | 19.4°C | 1.8°C | 61 mm | 83% | 2.4 m/s | 3.1 |
| 2009 | 14.3°C | 10.6°C | 6.9°C | 17.1°C | 2.8°C | 109 mm | 89% | 3.3 m/s | 3 |
| 2008 | 14.7°C | 9.6°C | 4.5°C | 19.7°C | 1.3°C | 39 mm | 84% | 2.6 m/s | 3.6 |
| 2007 | 14.9°C | 11.3°C | 7.7°C | 18.8°C | 2.3°C | 134 mm | 86% | 3.5 m/s | 2.8 |
| 2006 | 16.0°C | 11.7°C | 7.5°C | 21.2°C | 2.9°C | 152 mm | 86% | 3.6 m/s | 3.2 |
| 2005 | 14.3°C | 10.4°C | 6.4°C | 18.4°C | 2.0°C | 114 mm | 87% | 3.1 m/s | 3 |
| 2004 | 13.3°C | 9.8°C | 6.4°C | 16.1°C | 2.1°C | 139 mm | 87% | 3.4 m/s | 3 |
| 2003 | 14.2°C | 10.2°C | 6.2°C | 16.9°C | 3.1°C | 121 mm | 86% | 3 m/s | 3 |
| 2002 | 14.3°C | 10.2°C | 6.1°C | 17.4°C | 3.0°C | 118 mm | 87% | 3.2 m/s | 3.1 |
| 2001 | 14.7°C | 10.6°C | 6.4°C | 18.8°C | 2.9°C | 110 mm | 85% | 2.8 m/s | 2.9 |
| 2000 | 13.4°C | 9.5°C | 5.7°C | 16.2°C | 3.5°C | 137 mm | 86% | 3.3 m/s | 3 |
| 1999 | 14.5°C | 10.3°C | 6.2°C | 18.4°C | 3.2°C | 124 mm | 86% | 3.2 m/s | 3.3 |
| 1998 | 15.6°C | 11.7°C | 7.8°C | 21.7°C | 5.0°C | 135 mm | 88% | 3.4 m/s | 2.9 |
| 1997 | 14.3°C | 10.2°C | 6.2°C | 17.9°C | 2.5°C | 128 mm | 88% | 2.9 m/s | 3.1 |
| 1996 | 13.8°C | 10.0°C | 6.1°C | 18.8°C | 2.2°C | 120 mm | 87% | 3.4 m/s | 3.2 |
| 1995 | 14.9°C | 11.0°C | 7.1°C | 18.7°C | 1.8°C | 95 mm | 86% | 3.6 m/s | 3.3 |
| 1994 | 15.5°C | 10.8°C | 6.1°C | 21.4°C | 2.6°C | 85 mm | 87% | 2.7 m/s | 3.2 |
| 1993 | 13.8°C | 9.8°C | 5.7°C | 18.1°C | 0.7°C | 114 mm | 86% | 3.4 m/s | 3.1 |
| 1992 | 13.0°C | 9.6°C | 6.2°C | 18.3°C | 2.8°C | 152 mm | 89% | 3.6 m/s | 2.9 |
| 1991 | 14.3°C | 10.0°C | 5.7°C | 19.4°C | 2.2°C | 111 mm | 86% | 3.3 m/s | 3.2 |
| 1990 ❄️ | 13.0°C | 8.9°C | 4.8°C | 16.2°C | 0.7°C | 99 mm | 86% | 3.3 m/s | 3.2 |
| 1989 | 14.4°C | 9.9°C | 5.5°C | 19.7°C | 2.4°C | 107 mm | 84% | 2.8 m/s | 3.1 |
| 1988 | 14.2°C | 9.9°C | 5.5°C | 18.0°C | 1.5°C | 126 mm | 88% | 3.2 m/s | 3 |
| 1987 | 15.4°C | 10.4°C | 5.4°C | 20.1°C | 2.1°C | 64 mm | 84% | 2.5 m/s | 3.3 |
| 1986 | 13.2°C | 9.1°C | 4.9°C | 18.0°C | 0.9°C | 105 mm | 87% | 3 m/s | 3.1 |
| 1985 | 14.3°C | 10.4°C | 6.5°C | 18.7°C | 3.0°C | 160 mm | 87% | 3.5 m/s | 3.1 |
| 1984 | 13.4°C | 9.8°C | 6.3°C | 18.3°C | 3.9°C | 119 mm | 87% | 3.4 m/s | 3.1 |
| 1983 🌧️ | 14.9°C | 11.2°C | 7.5°C | 19.9°C | 1.4°C | 160 mm | 87% | 3.8 m/s | — |
| 1982 | 15.6°C | 10.3°C | 5.1°C | 20.9°C | -0.1°C | 73 mm | 84% | 2.6 m/s | — |
| 1981 | 13.6°C | 9.8°C | 6.1°C | 16.3°C | -0.6°C | 138 mm | 86% | 3.8 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 14.6°C with lows near 6.4°C (mean 10.5°C), based on 45 years of NASA POWER data.
August averages 113 mm of rainfall in Manjimup, a relatively wet time of year. The wettest on record was 160 mm in 1983.
The hottest August reached 23.2°C in 2019. The coldest dipped to -0.6°C in 1981.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 0.7°C. Daytime highs moved from 14.4°C to 15.1°C and overnight lows from 6.3°C to 6.9°C over the same span.
August is one of the cooler months of the year in Manjimup and a relatively wet time of year, so plan for around 14.6°C daytime highs and 6.4°C at night.
Not quite — August is the 2nd coolest month in Manjimup, averaging 10.5°C.
For August in Manjimup, pack warm layers and a jacket for chilly mornings, with typical highs of 14.6°C and lows of 6.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 86% — quite humid.
Average wind speed in August is 3.2 m/s. The windiest August on record averaged 4.1 m/s (2024).
The wettest August on record was 1983 with 160 mm. On average, August sees 113 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 Manjimup 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.
