August is one of the cooler months of the year in Muswellbrook, with average highs near 16.4°C and lows around 4.9°C (mean 10.6°C). It is one of the drier months, averaging 46 mm of rainfall and 73% relative humidity across the period.
August is one of the cooler months of the year in Muswellbrook. Across 45 years of records, the warmest August in Muswellbrook was 2024 — when the month averaged 13.4°C — while the coldest was 1989 at 8.3°C. Typical August days reach 16.4°C with nights near 4.9°C. The long-term trend is warming, about 0.4°C per decade.
August is one of the drier months in Muswellbrook, averaging 46 mm of rainfall. The wettest August on record was 1987 with 155 mm, while the driest was 1995 at 1 mm.
Relative humidity in Muswellbrook during August averages 73%. The most humid August was 1998 at 87%, and the least humid was 2018 at 59%.
August receives about 3.8 kWh/m²/day of solar energy in Muswellbrook. The sunniest Augusts were 1995, 2009 and 2017 at 4.3 kWh/m²/day, and the cloudiest was 1987 at 3.2.
Average wind speed in Muswellbrook during August is 0.8 m/s. The windiest Augusts were 1990 and 1991 at 1 m/s, while the calmest were 1982 and 2023 at 0.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 10.0°C | 10.3°C | 10.8°C | 10.8°C | 11.6°C | +1.6°C |
| Avg High | 15.5°C | 16.1°C | 16.8°C | 16.7°C | 17.1°C | +1.6°C |
| Avg Low | 4.5°C | 4.5°C | 4.8°C | 4.9°C | 6.2°C | +1.7°C |
| Avg Rain | 53 mm | 52 mm | 37 mm | 37 mm | 54 mm | +1 mm |
August temperatures in Muswellbrook have risen by about 1.8°C between 1981–1985 and 2021–2025.
August has ranged from a record low of -1.5°C (1996) to a record high of 26.8°C (1995).
Rainfall in August is one of the drier months, averaging 46 mm, with a wettest year of 155 mm.
A quieter season to visit Muswellbrook
If your dates are flexible, the more temperate months of December and February tend to be the most comfortable for visiting Muswellbrook. That said, August — with days averaging 16.4°C and nights around 4.9°C (mean 10.6°C) and moderate rainfall (46 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 | 15.0°C | 10.8°C | 6.7°C | 20.7°C | 0.8°C | 127 mm | 85% | 0.8 m/s | 3.4 |
| 2024 🔥 | 18.7°C | 13.4°C | 8.1°C | 26.4°C | 3.1°C | 41 mm | 76% | 0.7 m/s | 3.5 |
| 2023 | 19.8°C | 13.3°C | 6.8°C | 23.5°C | 2.7°C | 30 mm | 68% | 0.6 m/s | 3.9 |
| 2022 | 15.7°C | 10.8°C | 5.8°C | 19.7°C | 2.3°C | 61 mm | 83% | 0.7 m/s | 3.4 |
| 2021 | 18.0°C | 11.6°C | 5.2°C | 23.9°C | 1.8°C | 32 mm | 70% | 0.8 m/s | 3.9 |
| 2020 | 15.3°C | 9.9°C | 4.6°C | 20.9°C | -0.4°C | 35 mm | 76% | 0.8 m/s | 3.9 |
| 2019 | 17.9°C | 11.4°C | 5.0°C | 23.6°C | 0.7°C | 39 mm | 59% | 0.9 m/s | 4.1 |
| 2018 | 17.3°C | 10.7°C | 4.0°C | 21.5°C | 0.4°C | 23 mm | 59% | 0.8 m/s | 4.1 |
| 2017 | 17.9°C | 11.3°C | 4.7°C | 24.0°C | 1.3°C | 12 mm | 59% | 0.8 m/s | 4.3 |
| 2016 | 16.4°C | 10.8°C | 5.2°C | 20.8°C | 0.9°C | 45 mm | 76% | 0.7 m/s | 3.6 |
| 2015 | 16.5°C | 10.6°C | 4.7°C | 22.3°C | -1.3°C | 31 mm | 75% | 0.7 m/s | 3.8 |
| 2014 | 15.6°C | 10.5°C | 5.4°C | 19.1°C | 1.1°C | 87 mm | 79% | 0.7 m/s | 3.6 |
| 2013 | 18.2°C | 11.6°C | 5.0°C | 25.3°C | -0.1°C | 8 mm | 66% | 0.8 m/s | 4.1 |
| 2012 | 16.5°C | 10.3°C | 4.2°C | 23.0°C | -0.1°C | 17 mm | 67% | 0.8 m/s | 4.2 |
| 2011 | 16.3°C | 11.3°C | 6.3°C | 20.1°C | 2.1°C | 61 mm | 82% | 0.7 m/s | 3.5 |
| 2010 | 14.5°C | 9.5°C | 4.5°C | 18.8°C | 1.6°C | 44 mm | 77% | 0.9 m/s | 3.8 |
| 2009 | 19.4°C | 12.5°C | 5.6°C | 26.1°C | 1.6°C | 3 mm | 60% | 0.8 m/s | 4.3 |
| 2008 | 15.0°C | 9.0°C | 3.0°C | 20.1°C | -1.5°C | 39 mm | 72% | 0.8 m/s | 3.8 |
| 2007 | 16.0°C | 11.1°C | 6.3°C | 21.6°C | 1.2°C | 84 mm | 81% | 0.8 m/s | 3.6 |
| 2006 | 17.8°C | 11.5°C | 5.3°C | 21.6°C | 0.2°C | 30 mm | 68% | 0.7 m/s | 4 |
| 2005 | 17.1°C | 10.5°C | 3.9°C | 21.9°C | -1.5°C | 9 mm | 68% | 0.8 m/s | 4.1 |
| 2004 | 17.2°C | 11.3°C | 5.4°C | 24.9°C | 2.1°C | 43 mm | 67% | 0.9 m/s | 3.7 |
| 2003 | 16.6°C | 10.7°C | 4.8°C | 21.6°C | 0.6°C | 65 mm | 70% | 0.8 m/s | 3.8 |
| 2002 | 18.2°C | 11.6°C | 5.0°C | 23.8°C | 1.0°C | 17 mm | 65% | 0.8 m/s | 3.9 |
| 2001 | 15.9°C | 10.0°C | 4.1°C | 20.5°C | 0.7°C | 34 mm | 72% | 0.9 m/s | 3.9 |
| 2000 | 15.2°C | 10.1°C | 5.0°C | 18.2°C | 0.9°C | 49 mm | 77% | 0.8 m/s | 3.7 |
| 1999 | 15.9°C | 10.6°C | 5.3°C | 20.9°C | 1.1°C | 47 mm | 80% | 0.7 m/s | 3.8 |
| 1998 | 15.4°C | 11.1°C | 6.8°C | 19.3°C | -0.3°C | 140 mm | 87% | 0.7 m/s | 3.4 |
| 1997 | 16.6°C | 10.2°C | 3.7°C | 22.2°C | -0.8°C | 16 mm | 66% | 0.8 m/s | 4.2 |
| 1996 | 15.9°C | 9.9°C | 3.9°C | 21.3°C | -1.5°C | 89 mm | 72% | 0.9 m/s | 3.8 |
| 1995 | 19.7°C | 12.6°C | 5.4°C | 26.8°C | -0.5°C | 1 mm | 66% | 0.7 m/s | 4.3 |
| 1994 | 16.5°C | 9.9°C | 3.3°C | 24.3°C | -1.3°C | 16 mm | 66% | 0.7 m/s | 4.1 |
| 1993 | 16.2°C | 10.6°C | 5.0°C | 20.9°C | 1.8°C | 44 mm | 79% | 0.7 m/s | 4 |
| 1992 | 16.1°C | 10.0°C | 4.0°C | 22.5°C | -0.2°C | 39 mm | 68% | 0.9 m/s | 3.9 |
| 1991 | 15.5°C | 9.6°C | 3.8°C | 19.7°C | 0.0°C | 18 mm | 69% | 1 m/s | 4.2 |
| 1990 | 13.1°C | 8.5°C | 3.9°C | 18.0°C | 0.8°C | 107 mm | 82% | 1 m/s | 3.5 |
| 1989 ❄️ | 13.3°C | 8.3°C | 3.3°C | 17.8°C | -0.6°C | 12 mm | 81% | 0.8 m/s | 3.9 |
| 1988 | 16.2°C | 10.7°C | 5.1°C | 22.6°C | 0.5°C | 50 mm | 78% | 0.7 m/s | 3.8 |
| 1987 🌧️ | 16.0°C | 11.3°C | 6.7°C | 20.7°C | 2.2°C | 155 mm | 84% | 0.7 m/s | 3.2 |
| 1986 | 14.4°C | 9.1°C | 3.8°C | 19.1°C | -0.4°C | 135 mm | 80% | 0.7 m/s | 3.9 |
| 1985 | 14.8°C | 9.5°C | 4.3°C | 20.1°C | -0.5°C | 58 mm | 79% | 0.8 m/s | 3.7 |
| 1984 | 14.9°C | 9.5°C | 4.2°C | 18.6°C | 1.2°C | 25 mm | 76% | 0.9 m/s | 3.9 |
| 1983 | 15.3°C | 10.0°C | 4.7°C | 19.1°C | 1.6°C | 25 mm | 79% | 0.7 m/s | — |
| 1982 | 20.2°C | 12.9°C | 5.7°C | 25.8°C | 0.7°C | 4 mm | 59% | 0.6 m/s | — |
| 1981 | 14.7°C | 8.9°C | 3.1°C | 18.6°C | -0.3°C | 11 mm | 72% | 0.9 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 16.4°C with lows near 4.9°C (mean 10.6°C), based on 45 years of NASA POWER data.
August averages 46 mm of rainfall in Muswellbrook, one of the drier months. The wettest on record was 155 mm in 1987.
The hottest August reached 26.8°C in 1995. The coldest dipped to -1.5°C in 1996.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.8°C. Daytime highs moved from 16°C to 17.4°C and overnight lows from 4.4°C to 6.5°C over the same span.
August is one of the cooler months of the year in Muswellbrook and one of the drier months, so plan for around 16.4°C daytime highs and 4.9°C at night.
Not quite — August is the 3rd coolest month in Muswellbrook, averaging 10.6°C.
For August in Muswellbrook, pack warm layers and a jacket for chilly mornings, with typical highs of 16.4°C and lows of 4.9°C.
Relative humidity in August averages 73% — moderately humid.
Average wind speed in August is 0.8 m/s. The windiest August on record averaged 1 m/s (1990).
The wettest August on record was 1987 with 155 mm. On average, August sees 46 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 Muswellbrook 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.
