August is one of the cooler months of the year in Goonellabah, with average highs near 20.4°C and lows around 10.3°C (mean 15.4°C). It is one of the drier months, averaging 51 mm of rainfall and 70% relative humidity across the period.
August is one of the cooler months of the year in Goonellabah. Across 45 years of records, the warmest Augusts in Goonellabah were 2023 and 2024 — when the month averaged 18.4°C — while the coldest was 1989 at 12.8°C. Typical August days reach 20.4°C with nights near 10.3°C. The long-term trend is warming, about 0.5°C per decade.
August is one of the drier months in Goonellabah, averaging 51 mm of rainfall. The wettest August on record was 2014 with 208 mm, while the driest was 1991 at 2 mm.
Relative humidity in Goonellabah during August averages 70%. The most humid August was 1999 at 81%, and the least humid was 2018 at 56%.
August receives about 4.2 kWh/m²/day of solar energy in Goonellabah. The sunniest Augusts were 2013, 2017 and 2018 at 4.7 kWh/m²/day, and the cloudiest were 1998, 2007 and 2014 at 3.7.
Average wind speed in Goonellabah during August is 2.3 m/s. The windiest Augusts were 2002 and 2014 at 2.7 m/s, while the calmest was 1982 at 1.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.3°C | 15.0°C | 15.7°C | 15.6°C | 16.6°C | +2.3°C |
| Avg High | 19.1°C | 19.9°C | 20.8°C | 20.9°C | 21.4°C | +2.3°C |
| Avg Low | 9.5°C | 10.0°C | 10.5°C | 10.3°C | 11.7°C | +2.2°C |
| Avg Rain | 57 mm | 37 mm | 54 mm | 56 mm | 55 mm | -2 mm |
August temperatures in Goonellabah have risen by about 2.5°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 3.9°C (1985) to a record high of 32°C (2024).
Rainfall in August is one of the drier months, averaging 51 mm, with a wettest year of 208 mm.
A quieter season to visit Goonellabah
If your dates are flexible, the more temperate months of October and November tend to be the most comfortable for visiting Goonellabah. That said, August — with days averaging 20.4°C and nights around 10.3°C (mean 15.4°C) and moderate rainfall (51 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 | 18.9°C | 15.1°C | 11.3°C | 25.1°C | 6.8°C | 145 mm | 79% | 2.4 m/s | 4 |
| 2024 | 23.1°C | 18.4°C | 13.8°C | 32.0°C | 8.1°C | 110 mm | 75% | 2.2 m/s | 3.9 |
| 2023 🔥 | 23.2°C | 18.4°C | 13.5°C | 29.3°C | 9.8°C | 17 mm | 64% | 2.2 m/s | 4 |
| 2022 | 20.1°C | 15.2°C | 10.4°C | 25.0°C | 6.6°C | 17 mm | 75% | 2.2 m/s | 3.9 |
| 2021 | 22.3°C | 16.7°C | 11.0°C | 28.0°C | 6.6°C | 11 mm | 68% | 2.1 m/s | 4.3 |
| 2020 | 21.0°C | 15.6°C | 10.2°C | 26.4°C | 7.1°C | 29 mm | 67% | 2.2 m/s | 4.4 |
| 2019 | 22.1°C | 16.6°C | 11.0°C | 26.6°C | 6.0°C | 20 mm | 64% | 2.2 m/s | 4.4 |
| 2018 | 22.3°C | 16.1°C | 9.8°C | 28.1°C | 6.1°C | 28 mm | 56% | 2.1 m/s | 4.7 |
| 2017 | 21.5°C | 15.6°C | 9.7°C | 29.0°C | 6.6°C | 2 mm | 66% | 2.1 m/s | 4.7 |
| 2016 | 20.4°C | 15.7°C | 11.1°C | 24.1°C | 8.0°C | 94 mm | 73% | 2.3 m/s | 3.9 |
| 2015 | 21.9°C | 16.2°C | 10.6°C | 27.8°C | 5.8°C | 23 mm | 68% | 2.1 m/s | 4.2 |
| 2014 🌧️ | 19.1°C | 15.2°C | 11.2°C | 25.6°C | 7.9°C | 208 mm | 75% | 2.7 m/s | 3.7 |
| 2013 | 21.7°C | 15.8°C | 10.0°C | 27.2°C | 4.9°C | 6 mm | 69% | 2 m/s | 4.7 |
| 2012 | 20.4°C | 14.7°C | 9.0°C | 27.3°C | 5.1°C | 4 mm | 67% | 2.2 m/s | 4.5 |
| 2011 | 19.7°C | 15.3°C | 10.9°C | 23.5°C | 6.3°C | 124 mm | 76% | 2.2 m/s | 3.9 |
| 2010 | 19.5°C | 14.7°C | 9.9°C | 25.4°C | 7.3°C | 47 mm | 70% | 2.3 m/s | 4.1 |
| 2009 | 22.0°C | 16.5°C | 11.0°C | 30.5°C | 7.7°C | 3 mm | 74% | 2.1 m/s | 4.6 |
| 2008 | 19.6°C | 14.0°C | 8.4°C | 25.5°C | 4.1°C | 25 mm | 67% | 2.2 m/s | 4.4 |
| 2007 | 21.5°C | 16.6°C | 11.7°C | 27.1°C | 6.3°C | 178 mm | 69% | 2.6 m/s | 3.7 |
| 2006 | 20.8°C | 15.9°C | 11.0°C | 28.0°C | 7.6°C | 139 mm | 71% | 2.6 m/s | 4.1 |
| 2005 | 19.3°C | 14.8°C | 10.4°C | 23.7°C | 5.8°C | 23 mm | 74% | 2.4 m/s | 4 |
| 2004 | 22.4°C | 16.4°C | 10.3°C | 29.0°C | 6.5°C | 19 mm | 58% | 2.5 m/s | 4.5 |
| 2003 | 20.7°C | 15.8°C | 11.0°C | 28.2°C | 5.4°C | 17 mm | 71% | 2.5 m/s | 3.9 |
| 2002 | 20.7°C | 15.9°C | 11.2°C | 27.0°C | 6.8°C | 87 mm | 68% | 2.7 m/s | 3.8 |
| 2001 | 20.5°C | 15.0°C | 9.5°C | 24.2°C | 6.2°C | 23 mm | 65% | 2.2 m/s | 4.4 |
| 2000 | 20.8°C | 15.6°C | 10.4°C | 25.6°C | 6.7°C | 30 mm | 65% | 2.3 m/s | 4.2 |
| 1999 | 18.4°C | 14.6°C | 10.8°C | 23.5°C | 6.7°C | 108 mm | 81% | 2.3 m/s | 3.9 |
| 1998 | 20.2°C | 16.4°C | 12.6°C | 24.7°C | 6.9°C | 92 mm | 79% | 2.5 m/s | 3.7 |
| 1997 | 19.9°C | 14.9°C | 9.8°C | 23.8°C | 5.3°C | 12 mm | 70% | 2.3 m/s | 4.4 |
| 1996 | 19.5°C | 14.5°C | 9.5°C | 25.6°C | 5.4°C | 44 mm | 76% | 2.1 m/s | 4.1 |
| 1995 | 21.5°C | 16.2°C | 10.8°C | 30.4°C | 4.1°C | 29 mm | 67% | 2.3 m/s | 4.2 |
| 1994 | 19.4°C | 14.5°C | 9.7°C | 23.8°C | 4.7°C | 29 mm | 69% | 2 m/s | 4.3 |
| 1993 | 20.1°C | 15.3°C | 10.6°C | 25.7°C | 6.6°C | 33 mm | 72% | 2 m/s | 4.3 |
| 1992 | 20.6°C | 15.2°C | 9.7°C | 26.0°C | 5.7°C | 16 mm | 65% | 2.4 m/s | 4.4 |
| 1991 | 21.4°C | 15.3°C | 9.2°C | 26.9°C | 5.5°C | 2 mm | 62% | 2.3 m/s | 4.5 |
| 1990 | 18.1°C | 12.9°C | 7.7°C | 21.5°C | 4.0°C | 9 mm | 71% | 2.4 m/s | 4.3 |
| 1989 ❄️ | 17.6°C | 12.8°C | 8.0°C | 22.9°C | 4.0°C | 41 mm | 74% | 2 m/s | 4.5 |
| 1988 | 19.1°C | 14.9°C | 10.8°C | 23.7°C | 4.4°C | 47 mm | 79% | 2.3 m/s | 4 |
| 1987 | 19.1°C | 15.0°C | 11.0°C | 21.8°C | 6.9°C | 160 mm | 81% | 2.2 m/s | 3.9 |
| 1986 | 19.5°C | 14.5°C | 9.4°C | 24.1°C | 6.4°C | 40 mm | 69% | 2.3 m/s | 3.9 |
| 1985 | 18.6°C | 14.0°C | 9.3°C | 25.7°C | 3.9°C | 28 mm | 75% | 2.1 m/s | 3.9 |
| 1984 | 19.3°C | 13.8°C | 8.3°C | 22.7°C | 5.0°C | 14 mm | 73% | 2 m/s | 4.3 |
| 1983 | 18.1°C | 14.1°C | 10.1°C | 20.7°C | 6.1°C | 75 mm | 78% | 2.1 m/s | — |
| 1982 | 20.2°C | 15.5°C | 10.7°C | 25.6°C | 4.5°C | 66 mm | 72% | 1.9 m/s | — |
| 1981 | 20.4°C | 14.3°C | 8.2°C | 25.0°C | 5.4°C | 42 mm | 62% | 2.3 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 20.4°C with lows near 10.3°C (mean 15.4°C), based on 45 years of NASA POWER data.
August averages 51 mm of rainfall in Goonellabah, one of the drier months. The wettest on record was 208 mm in 2014.
The hottest August reached 32°C in 2024. The coldest dipped to 3.9°C in 1985.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 2.5°C. Daytime highs moved from 19.3°C to 21.5°C and overnight lows from 9.3°C to 12°C over the same span.
August is one of the cooler months of the year in Goonellabah and one of the drier months, so plan for around 20.4°C daytime highs and 10.3°C at night.
Not quite — August is the 3rd coolest month in Goonellabah, averaging 15.4°C.
For August in Goonellabah, pack light layers you can adjust through the day, with typical highs of 20.4°C and lows of 10.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 70% — moderately humid.
Average wind speed in August is 2.3 m/s. The windiest August on record averaged 2.7 m/s (2002).
The wettest August on record was 2014 with 208 mm. On average, August sees 51 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 Goonellabah 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.
