August is one of the cooler months of the year in Geraldton, with average highs near 19.1°C and lows around 16.2°C (mean 17.7°C). It is a relatively wet time of year, averaging 59 mm of rainfall and 70% relative humidity across the period.
August is one of the cooler months of the year in Geraldton. Across 45 years of records, the warmest August in Geraldton was 2014 — when the month averaged 19.6°C — while the coldest was 1986 at 16.1°C. Typical August days reach 19.1°C with nights near 16.2°C. The long-term trend is warming, about 0.2°C per decade.
August is a relatively wet time of year in Geraldton, averaging 59 mm of rainfall. The wettest August on record was 1992 with 144 mm, while the driest was 2008 at 12 mm.
Relative humidity in Geraldton during August averages 70%. The most humid August was 2009 at 74%, and the least humid were 1989 and 2008 at 66%.
August receives about 4.3 kWh/m²/day of solar energy in Geraldton. The sunniest Augusts were 2019 and 2023 at 4.7 kWh/m²/day, and the cloudiest were 1990, 1996 and 1998 at 4.
Average wind speed in Geraldton during August is 5.5 m/s. The windiest August was 2022 at 6.6 m/s, while the calmest were 1998 and 2014 at 4.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 17.5°C | 17.6°C | 17.5°C | 17.9°C | 18.1°C | +0.6°C |
| Avg High | 18.9°C | 18.9°C | 19.0°C | 19.4°C | 19.6°C | +0.7°C |
| Avg Low | 16.1°C | 16.2°C | 16.0°C | 16.4°C | 16.6°C | +0.5°C |
| Avg Rain | 53 mm | 67 mm | 59 mm | 57 mm | 60 mm | +7 mm |
August temperatures in Geraldton have risen by about 0.5°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 12°C (2000) to a record high of 25°C (2014).
Rainfall in August is a relatively wet time of year, averaging 59 mm, with a wettest year of 144 mm.
A quieter season to visit Geraldton
If your dates are flexible, the more temperate months of December and April tend to be the most comfortable for visiting Geraldton. That said, August — with days averaging 19.1°C and nights around 16.2°C (mean 17.7°C) and moderate rainfall (59 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 | 19.5°C | 17.9°C | 16.2°C | 22.8°C | 13.2°C | 73 mm | 70% | 6.1 m/s | 4.4 |
| 2024 | 19.7°C | 18.6°C | 17.5°C | 21.7°C | 15.0°C | 45 mm | 69% | 5.2 m/s | 4.2 |
| 2023 | 19.8°C | 18.2°C | 16.5°C | 24.1°C | 13.6°C | 28 mm | 74% | 4.9 m/s | 4.7 |
| 2022 | 19.4°C | 17.8°C | 16.2°C | 22.6°C | 13.9°C | 119 mm | 68% | 6.6 m/s | 4.3 |
| 2021 | 19.5°C | 17.9°C | 16.2°C | 22.7°C | 13.9°C | 25 mm | 69% | 5.6 m/s | 4.6 |
| 2020 | 19.4°C | 18.1°C | 16.7°C | 23.1°C | 14.8°C | 67 mm | 69% | 6.2 m/s | 4.2 |
| 2019 | 19.8°C | 17.9°C | 16.0°C | 23.5°C | 14.0°C | 43 mm | 69% | 5.7 m/s | 4.7 |
| 2018 | 18.6°C | 17.2°C | 15.8°C | 22.1°C | 14.0°C | 65 mm | 69% | 6.2 m/s | 4.4 |
| 2017 | 18.5°C | 17.4°C | 16.2°C | 20.8°C | 13.8°C | 71 mm | 71% | 5.5 m/s | 4.3 |
| 2016 | 18.0°C | 16.8°C | 15.5°C | 20.7°C | 13.0°C | 66 mm | 69% | 5.3 m/s | 4.4 |
| 2015 | 19.3°C | 17.7°C | 16.1°C | 22.2°C | 14.1°C | 33 mm | 71% | 5.4 m/s | 4.3 |
| 2014 🔥 | 21.4°C | 19.6°C | 17.8°C | 25.0°C | 14.5°C | 30 mm | 70% | 4.6 m/s | 4.5 |
| 2013 | 20.1°C | 18.8°C | 17.5°C | 22.8°C | 14.8°C | 80 mm | 70% | 5.4 m/s | 4.1 |
| 2012 | 19.1°C | 17.8°C | 16.5°C | 21.9°C | 14.4°C | 29 mm | 71% | 4.7 m/s | 4.5 |
| 2011 | 19.6°C | 18.3°C | 17.0°C | 22.2°C | 14.1°C | 70 mm | 70% | 5.3 m/s | 4.4 |
| 2010 | 19.2°C | 17.5°C | 15.7°C | 21.9°C | 13.6°C | 88 mm | 68% | 5.3 m/s | 4.4 |
| 2009 | 19.0°C | 17.9°C | 16.7°C | 20.8°C | 14.3°C | 61 mm | 74% | 5.3 m/s | 4.2 |
| 2008 | 19.6°C | 17.2°C | 14.9°C | 21.2°C | 13.3°C | 12 mm | 66% | 5.7 m/s | 4.6 |
| 2007 | 19.5°C | 18.0°C | 16.6°C | 22.3°C | 14.6°C | 36 mm | 68% | 5.4 m/s | 4.4 |
| 2006 | 20.1°C | 18.7°C | 17.3°C | 23.2°C | 15.3°C | 40 mm | 72% | 5.2 m/s | 4.2 |
| 2005 | 18.8°C | 17.3°C | 15.9°C | 22.3°C | 13.3°C | 78 mm | 69% | 5.9 m/s | 4.3 |
| 2004 | 18.2°C | 16.9°C | 15.6°C | 21.3°C | 12.5°C | 65 mm | 68% | 5.9 m/s | 4.4 |
| 2003 | 18.6°C | 17.3°C | 16.1°C | 20.8°C | 14.0°C | 117 mm | 70% | 5.4 m/s | 4.1 |
| 2002 | 18.6°C | 17.2°C | 15.8°C | 20.8°C | 13.5°C | 61 mm | 68% | 5.6 m/s | 4.3 |
| 2001 | 18.7°C | 17.2°C | 15.8°C | 21.1°C | 13.6°C | 43 mm | 67% | 5.4 m/s | 4.4 |
| 2000 | 18.7°C | 17.1°C | 15.5°C | 22.0°C | 12.0°C | 79 mm | 68% | 5.8 m/s | 4.3 |
| 1999 | 19.2°C | 17.7°C | 16.1°C | 21.6°C | 13.8°C | 38 mm | 69% | 5.9 m/s | 4.3 |
| 1998 | 19.6°C | 18.4°C | 17.3°C | 22.2°C | 15.2°C | 34 mm | 72% | 4.6 m/s | 4 |
| 1997 | 18.9°C | 17.4°C | 15.9°C | 23.0°C | 13.6°C | 79 mm | 68% | 5.7 m/s | 4.4 |
| 1996 | 18.7°C | 17.5°C | 16.3°C | 21.4°C | 14.1°C | 98 mm | 69% | 5.2 m/s | 4 |
| 1995 | 19.4°C | 17.8°C | 16.2°C | 22.0°C | 13.9°C | 19 mm | 69% | 5.5 m/s | 4.5 |
| 1994 | 20.1°C | 18.5°C | 16.9°C | 22.6°C | 14.8°C | 83 mm | 70% | 5.7 m/s | 4.6 |
| 1993 | 18.4°C | 17.1°C | 15.7°C | 20.9°C | 13.4°C | 84 mm | 70% | 5.6 m/s | 4.5 |
| 1992 🌧️ | 18.3°C | 17.2°C | 16.0°C | 22.1°C | 12.9°C | 144 mm | 70% | 6.3 m/s | 4.1 |
| 1991 | 19.0°C | 17.5°C | 16.0°C | 22.1°C | 14.3°C | 34 mm | 71% | 5.9 m/s | 4.2 |
| 1990 | 17.6°C | 16.5°C | 15.4°C | 20.6°C | 13.5°C | 59 mm | 69% | 5.9 m/s | 4 |
| 1989 | 19.4°C | 17.7°C | 16.1°C | 23.0°C | 13.7°C | 24 mm | 66% | 5.4 m/s | 4.6 |
| 1988 | 19.2°C | 17.9°C | 16.5°C | 23.2°C | 14.3°C | 57 mm | 71% | 5.8 m/s | 4.2 |
| 1987 | 19.8°C | 17.8°C | 15.8°C | 23.5°C | 13.4°C | 68 mm | 68% | 5.6 m/s | 4.1 |
| 1986 ❄️ | 17.3°C | 16.1°C | 14.9°C | 20.9°C | 12.3°C | 45 mm | 69% | 5.1 m/s | 4.3 |
| 1985 | 18.5°C | 17.2°C | 15.9°C | 22.1°C | 12.6°C | 45 mm | 68% | 5.8 m/s | 4.1 |
| 1984 | 18.7°C | 17.6°C | 16.5°C | 20.7°C | 13.6°C | 88 mm | 68% | 5.3 m/s | 4.3 |
| 1983 | 19.6°C | 18.4°C | 17.1°C | 22.2°C | 14.7°C | 54 mm | 71% | 5.2 m/s | — |
| 1982 | 19.3°C | 17.8°C | 16.4°C | 22.2°C | 13.5°C | 43 mm | 73% | 5.1 m/s | — |
| 1981 | 18.0°C | 17.0°C | 15.9°C | 21.4°C | 13.5°C | 50 mm | 70% | 5.7 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 19.1°C with lows near 16.2°C (mean 17.7°C), based on 45 years of NASA POWER data.
August averages 59 mm of rainfall in Geraldton, a relatively wet time of year. The wettest on record was 144 mm in 1992.
The hottest August reached 25°C in 2014. The coldest dipped to 12°C in 2000.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 0.5°C. Daytime highs moved from 18.8°C to 19.6°C and overnight lows from 16.4°C to 16.5°C over the same span.
August is one of the cooler months of the year in Geraldton and a relatively wet time of year, so plan for around 19.1°C daytime highs and 16.2°C at night.
Yes — August is the coldest month of the year in Geraldton, averaging 17.7°C.
For August in Geraldton, pack light layers you can adjust through the day, with typical highs of 19.1°C and lows of 16.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 70% — moderately humid.
Average wind speed in August is 5.5 m/s. The windiest August on record averaged 6.6 m/s (2022).
The wettest August on record was 1992 with 144 mm. On average, August sees 59 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 Geraldton 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.
