August is one of the cooler months of the year in Kalgoorlie, with average highs near 19.9°C and lows around 5.6°C (mean 12.8°C). It is about average for rainfall, averaging 23 mm of rainfall and 60% relative humidity across the period.
August is one of the cooler months of the year in Kalgoorlie. Across 45 years of records, the warmest August in Kalgoorlie was 2006 — when the month averaged 16.1°C — while the coldest was 1992 at 10.4°C. Typical August days reach 19.9°C with nights near 5.6°C. The long-term trend is warming, about 0.3°C per decade.
August is about average for rainfall in Kalgoorlie, averaging 23 mm of rainfall. The wettest August on record was 1992 with 95 mm, while the driest was 1989 at 2 mm.
Relative humidity in Kalgoorlie during August averages 60%. The most humid August was 1992 at 76%, and the least humid was 2006 at 47%.
August receives about 4.3 kWh/m²/day of solar energy in Kalgoorlie. The sunniest August was 1995 at 4.8 kWh/m²/day, and the cloudiest was 1990 at 3.9.
Average wind speed in Kalgoorlie during August is 3.1 m/s. The windiest August was 2018 at 3.7 m/s, while the calmest was 1989 at 2.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 12.4°C | 12.2°C | 12.8°C | 13.0°C | 13.6°C | +1.2°C |
| Avg High | 19.4°C | 19.1°C | 20.1°C | 20.2°C | 20.8°C | +1.4°C |
| Avg Low | 5.3°C | 5.3°C | 5.4°C | 5.9°C | 6.4°C | +1.1°C |
| Avg Rain | 18 mm | 33 mm | 21 mm | 22 mm | 21 mm | +3 mm |
August temperatures in Kalgoorlie have risen by about 0.6°C between 1981–1985 and 2021–2025.
August has ranged from a record low of -0.3°C (1992) to a record high of 32°C (2023).
Rainfall in August is about average for rainfall, averaging 23 mm, with a wettest year of 95 mm.
A quieter season to visit Kalgoorlie
If your dates are flexible, the more temperate months of November and March tend to be the most comfortable for visiting Kalgoorlie. That said, August — with days averaging 19.9°C and nights around 5.6°C (mean 12.8°C) and low rainfall (23 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 | 19.7°C | 12.7°C | 5.8°C | 28.1°C | 2.0°C | 31 mm | 56% | 3.5 m/s | 4 |
| 2024 | 21.9°C | 14.7°C | 7.5°C | 27.3°C | 2.0°C | 7 mm | 59% | 3.5 m/s | 4.3 |
| 2023 | 23.5°C | 15.7°C | 7.9°C | 32.0°C | 3.2°C | 31 mm | 57% | 2.7 m/s | 4.4 |
| 2022 | 19.3°C | 12.3°C | 5.3°C | 26.1°C | 1.7°C | 37 mm | 58% | 3.5 m/s | 4.5 |
| 2021 | 20.3°C | 12.9°C | 5.6°C | 26.4°C | 1.6°C | 4 mm | 57% | 3.2 m/s | 4.5 |
| 2020 | 20.1°C | 13.2°C | 6.4°C | 31.2°C | 2.3°C | 13 mm | 58% | 3.3 m/s | 4.2 |
| 2019 | 20.2°C | 12.7°C | 5.3°C | 29.9°C | 1.2°C | 19 mm | 58% | 3.1 m/s | 4.5 |
| 2018 | 19.0°C | 12.1°C | 5.2°C | 26.4°C | 1.3°C | 29 mm | 60% | 3.7 m/s | 4.4 |
| 2017 | 19.4°C | 12.9°C | 6.4°C | 26.5°C | 0.7°C | 16 mm | 61% | 3.6 m/s | 4.1 |
| 2016 | 18.5°C | 12.0°C | 5.4°C | 25.5°C | 0.5°C | 30 mm | 63% | 3.4 m/s | 4 |
| 2015 | 19.4°C | 12.8°C | 6.1°C | 27.7°C | 1.0°C | 22 mm | 63% | 3 m/s | 4 |
| 2014 | 22.7°C | 14.8°C | 6.9°C | 30.2°C | 0.7°C | 22 mm | 55% | 2.7 m/s | 4.3 |
| 2013 | 21.1°C | 14.0°C | 6.9°C | 26.2°C | 3.7°C | 11 mm | 62% | 2.9 m/s | 4.4 |
| 2012 | 21.0°C | 13.3°C | 5.6°C | 27.2°C | 1.1°C | 7 mm | 57% | 2.8 m/s | 4.4 |
| 2011 | 20.9°C | 13.6°C | 6.2°C | 28.5°C | 1.4°C | 21 mm | 63% | 2.9 m/s | 4.3 |
| 2010 | 19.3°C | 12.1°C | 4.9°C | 26.9°C | 1.6°C | 40 mm | 59% | 2.7 m/s | 4.3 |
| 2009 | 21.6°C | 14.2°C | 6.9°C | 26.7°C | 2.9°C | 19 mm | 61% | 2.9 m/s | 4.3 |
| 2008 | 18.3°C | 11.1°C | 3.9°C | 23.4°C | 0.8°C | 25 mm | 57% | 2.7 m/s | 4.6 |
| 2007 | 21.5°C | 13.7°C | 5.8°C | 29.5°C | 2.5°C | 5 mm | 54% | 3.1 m/s | 4.6 |
| 2006 🔥 | 24.2°C | 16.1°C | 7.9°C | 31.6°C | 2.3°C | 4 mm | 47% | 3.3 m/s | 4.7 |
| 2005 | 19.3°C | 12.1°C | 5.0°C | 25.2°C | 0.4°C | 61 mm | 58% | 3.3 m/s | 4 |
| 2004 | 18.2°C | 11.4°C | 4.6°C | 23.9°C | 1.6°C | 11 mm | 63% | 3.2 m/s | 4.4 |
| 2003 | 18.9°C | 12.3°C | 5.6°C | 25.6°C | 2.1°C | 25 mm | 61% | 3.1 m/s | 4 |
| 2002 | 20.6°C | 12.8°C | 5.0°C | 27.5°C | 1.6°C | 15 mm | 49% | 3 m/s | 4.6 |
| 2001 | 20.4°C | 12.7°C | 5.0°C | 28.2°C | 1.3°C | 13 mm | 54% | 2.8 m/s | 4.5 |
| 2000 | 18.3°C | 11.3°C | 4.3°C | 24.5°C | 1.0°C | 29 mm | 63% | 3 m/s | 4.2 |
| 1999 | 20.0°C | 12.5°C | 5.0°C | 28.6°C | 1.2°C | 10 mm | 61% | 3.1 m/s | 4.4 |
| 1998 | 20.8°C | 13.9°C | 7.0°C | 29.4°C | 2.1°C | 20 mm | 66% | 2.9 m/s | 4.3 |
| 1997 | 18.4°C | 11.6°C | 4.8°C | 22.9°C | -0.2°C | 42 mm | 62% | 2.7 m/s | 4.3 |
| 1996 | 18.3°C | 11.7°C | 5.2°C | 27.7°C | 1.1°C | 21 mm | 65% | 2.9 m/s | 4.2 |
| 1995 | 20.4°C | 12.8°C | 5.2°C | 29.1°C | 1.4°C | 3 mm | 61% | 2.9 m/s | 4.8 |
| 1994 | 21.3°C | 13.9°C | 6.5°C | 29.5°C | 2.0°C | 43 mm | 56% | 3.2 m/s | 4.4 |
| 1993 | 19.2°C | 12.1°C | 5.0°C | 25.8°C | 1.1°C | 30 mm | 61% | 3.2 m/s | 4.3 |
| 1992 ❄️ 🌧️ | 16.1°C | 10.4°C | 4.8°C | 20.4°C | -0.3°C | 95 mm | 76% | 3.5 m/s | 4.1 |
| 1991 | 19.4°C | 12.2°C | 5.0°C | 25.8°C | 1.4°C | 5 mm | 62% | 3.2 m/s | 4.6 |
| 1990 | 17.3°C | 10.9°C | 4.5°C | 22.3°C | 0.4°C | 56 mm | 65% | 3.4 m/s | 3.9 |
| 1989 | 18.1°C | 10.9°C | 3.6°C | 23.3°C | 0.3°C | 2 mm | 58% | 2.6 m/s | 4.7 |
| 1988 | 19.5°C | 12.4°C | 5.2°C | 26.2°C | 1.8°C | 12 mm | 60% | 3.1 m/s | 4.4 |
| 1987 | 19.5°C | 12.0°C | 4.4°C | 26.5°C | 0.6°C | 24 mm | 56% | 2.7 m/s | 4.4 |
| 1986 | 17.1°C | 10.5°C | 3.8°C | 22.7°C | 0.5°C | 17 mm | 67% | 2.8 m/s | 4.5 |
| 1985 | 18.8°C | 12.1°C | 5.4°C | 23.9°C | 1.9°C | 13 mm | 62% | 3.2 m/s | 4.1 |
| 1984 | 18.8°C | 12.0°C | 5.1°C | 25.3°C | 1.9°C | 18 mm | 65% | 3.5 m/s | 4.3 |
| 1983 | 21.6°C | 14.1°C | 6.7°C | 27.2°C | 1.3°C | 25 mm | 55% | 3.2 m/s | — |
| 1982 | 22.8°C | 15.4°C | 8.0°C | 28.5°C | 1.6°C | 39 mm | 56% | 3 m/s | — |
| 1981 | 18.8°C | 12.0°C | 5.3°C | 24.9°C | 1.1°C | 12 mm | 62% | 3.4 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 19.9°C with lows near 5.6°C (mean 12.8°C), based on 45 years of NASA POWER data.
August averages 23 mm of rainfall in Kalgoorlie, about average for rainfall. The wettest on record was 95 mm in 1992.
The hottest August reached 32°C in 2023. The coldest dipped to -0.3°C in 1992.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 0.6°C. Daytime highs moved from 20.2°C to 20.9°C and overnight lows from 6.1°C to 6.4°C over the same span.
August is one of the cooler months of the year in Kalgoorlie and about average for rainfall, so plan for around 19.9°C daytime highs and 5.6°C at night.
Not quite — August is the 3rd coolest month in Kalgoorlie, averaging 12.8°C.
For August in Kalgoorlie, pack warm layers and a jacket for chilly mornings, with typical highs of 19.9°C and lows of 5.6°C.
Relative humidity in August averages 60% — moderately humid.
Average wind speed in August is 3.1 m/s. The windiest August on record averaged 3.7 m/s (2018).
The wettest August on record was 1992 with 95 mm. On average, August sees 23 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 Kalgoorlie 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.
