August is one of the cooler months of the year in Kalbarri, with average highs near 22.1°C and lows around 10.9°C (mean 16.5°C). It is a relatively wet time of year, averaging 40 mm of rainfall and 66% relative humidity across the period.
August is one of the cooler months of the year in Kalbarri. Across 45 years of records, the warmest August in Kalbarri was 2014 — when the month averaged 19.9°C — while the coldest was 1986 at 14.4°C. Typical August days reach 22.1°C with nights near 10.9°C. The long-term trend is warming, about 0.3°C per decade.
August is a relatively wet time of year in Kalbarri, averaging 40 mm of rainfall. The wettest August on record was 1992 with 148 mm, while the driest was 2008 at 7 mm.
Relative humidity in Kalbarri during August averages 66%. The most humid August was 1998 at 73%, and the least humid was 2008 at 56%.
August receives about 4.5 kWh/m²/day of solar energy in Kalbarri. The sunniest Augusts were 1989 and 2021 at 4.9 kWh/m²/day, and the cloudiest was 1990 at 4.
Average wind speed in Kalbarri during August is 3.5 m/s. The windiest August was 2022 at 4.1 m/s, while the calmest was 1998 at 2.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 16.2°C | 16.2°C | 16.4°C | 16.9°C | 17.2°C | +1°C |
| Avg High | 21.6°C | 21.4°C | 22.1°C | 22.6°C | 22.8°C | +1.2°C |
| Avg Low | 10.7°C | 10.8°C | 10.6°C | 11.2°C | 11.6°C | +0.9°C |
| Avg Rain | 40 mm | 47 mm | 31 mm | 40 mm | 41 mm | +1 mm |
August temperatures in Kalbarri have risen by about 1°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 4.1°C (1986) to a record high of 33.1°C (2023).
Rainfall in August is a relatively wet time of year, averaging 40 mm, with a wettest year of 148 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.4°C per decade while lows rose 0.2°C per decade, widening the gap between day and night.
A quieter season to visit Kalbarri
If your dates are flexible, the more temperate months of October and November tend to be the most comfortable for visiting Kalbarri. That said, August — with days averaging 22.1°C and nights around 10.9°C (mean 16.5°C) and moderate rainfall (40 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 | 22.2°C | 16.7°C | 11.3°C | 28.3°C | 7.6°C | 59 mm | 64% | 3.8 m/s | 4.4 |
| 2024 | 22.2°C | 17.4°C | 12.5°C | 26.1°C | 7.3°C | 34 mm | 70% | 3.2 m/s | 4.4 |
| 2023 | 25.8°C | 18.9°C | 12.0°C | 33.1°C | 7.0°C | 21 mm | 63% | 3.2 m/s | 4.8 |
| 2022 | 22.0°C | 16.5°C | 11.0°C | 26.3°C | 7.2°C | 71 mm | 63% | 4.1 m/s | 4.5 |
| 2021 | 22.6°C | 16.8°C | 11.1°C | 29.0°C | 5.9°C | 15 mm | 64% | 3.6 m/s | 4.9 |
| 2020 | 22.1°C | 17.0°C | 11.8°C | 30.8°C | 9.0°C | 47 mm | 64% | 3.8 m/s | 4.3 |
| 2019 | 22.9°C | 16.8°C | 10.7°C | 29.0°C | 6.7°C | 27 mm | 60% | 3.7 m/s | 4.8 |
| 2018 | 20.9°C | 15.7°C | 10.4°C | 28.7°C | 6.3°C | 47 mm | 66% | 3.9 m/s | 4.5 |
| 2017 | 21.6°C | 16.3°C | 11.1°C | 27.0°C | 5.4°C | 58 mm | 69% | 3.6 m/s | 4.4 |
| 2016 | 20.3°C | 15.1°C | 9.9°C | 25.9°C | 5.0°C | 41 mm | 70% | 3.5 m/s | 4.5 |
| 2015 | 21.9°C | 16.8°C | 11.6°C | 28.4°C | 8.0°C | 24 mm | 67% | 3.4 m/s | 4.4 |
| 2014 🔥 | 26.5°C | 19.9°C | 13.2°C | 32.0°C | 9.3°C | 21 mm | 57% | 3.1 m/s | 4.7 |
| 2013 | 23.5°C | 17.9°C | 12.3°C | 28.1°C | 9.8°C | 44 mm | 64% | 3.3 m/s | 4.5 |
| 2012 | 23.5°C | 17.3°C | 11.2°C | 27.7°C | 7.5°C | 18 mm | 67% | 3.1 m/s | 4.8 |
| 2011 | 22.2°C | 16.8°C | 11.3°C | 26.1°C | 6.3°C | 47 mm | 72% | 3.3 m/s | 4.5 |
| 2010 | 22.8°C | 16.7°C | 10.5°C | 27.2°C | 7.3°C | 73 mm | 59% | 3.5 m/s | 4.5 |
| 2009 | 22.3°C | 16.9°C | 11.5°C | 27.6°C | 6.7°C | 36 mm | 71% | 3.2 m/s | 4.5 |
| 2008 | 22.4°C | 15.9°C | 9.5°C | 25.0°C | 6.5°C | 7 mm | 56% | 3.7 m/s | 4.8 |
| 2007 | 22.9°C | 17.0°C | 11.0°C | 27.1°C | 6.8°C | 13 mm | 64% | 3.4 m/s | 4.8 |
| 2006 | 24.4°C | 18.5°C | 12.6°C | 30.3°C | 8.5°C | 15 mm | 67% | 3.1 m/s | 4.6 |
| 2005 | 21.6°C | 15.7°C | 9.7°C | 26.9°C | 5.9°C | 32 mm | 64% | 3.7 m/s | 4.6 |
| 2004 | 20.7°C | 15.4°C | 10.1°C | 24.0°C | 5.3°C | 25 mm | 63% | 3.6 m/s | 4.7 |
| 2003 | 21.1°C | 16.0°C | 10.8°C | 26.2°C | 8.1°C | 71 mm | 67% | 3.4 m/s | 4.3 |
| 2002 | 22.0°C | 16.2°C | 10.3°C | 25.7°C | 5.8°C | 30 mm | 62% | 3.6 m/s | 4.5 |
| 2001 | 22.6°C | 16.4°C | 10.2°C | 28.4°C | 6.1°C | 24 mm | 62% | 3.6 m/s | 4.6 |
| 2000 | 21.4°C | 15.6°C | 9.8°C | 26.4°C | 5.5°C | 52 mm | 65% | 3.7 m/s | 4.5 |
| 1999 | 21.8°C | 16.2°C | 10.6°C | 27.1°C | 5.0°C | 16 mm | 66% | 3.8 m/s | 4.5 |
| 1998 | 22.2°C | 17.1°C | 12.0°C | 26.3°C | 8.6°C | 12 mm | 73% | 2.6 m/s | 4.5 |
| 1997 | 21.5°C | 16.1°C | 10.6°C | 28.2°C | 5.7°C | 54 mm | 65% | 3.4 m/s | 4.5 |
| 1996 | 19.8°C | 15.2°C | 10.6°C | 25.4°C | 7.0°C | 52 mm | 73% | 3.2 m/s | 4.3 |
| 1995 | 22.9°C | 16.7°C | 10.5°C | 31.4°C | 7.8°C | 9 mm | 63% | 3.6 m/s | 4.8 |
| 1994 | 23.6°C | 17.6°C | 11.5°C | 29.6°C | 7.0°C | 71 mm | 63% | 3.7 m/s | 4.7 |
| 1993 | 21.4°C | 15.8°C | 10.2°C | 28.5°C | 5.6°C | 47 mm | 66% | 3.6 m/s | 4.7 |
| 1992 🌧️ | 19.4°C | 15.1°C | 10.7°C | 25.9°C | 6.0°C | 148 mm | 70% | 3.7 m/s | 4.3 |
| 1991 | 22.1°C | 16.7°C | 11.3°C | 27.5°C | 8.6°C | 14 mm | 67% | 3.6 m/s | 4.5 |
| 1990 | 19.7°C | 15.0°C | 10.3°C | 22.6°C | 6.0°C | 49 mm | 69% | 3.7 m/s | 4 |
| 1989 | 22.1°C | 15.9°C | 9.7°C | 27.3°C | 4.3°C | 17 mm | 62% | 3.7 m/s | 4.9 |
| 1988 | 22.1°C | 16.9°C | 11.7°C | 26.5°C | 8.5°C | 42 mm | 69% | 3.5 m/s | 4.4 |
| 1987 | 23.4°C | 17.1°C | 10.8°C | 28.7°C | 5.2°C | 41 mm | 57% | 3.5 m/s | 4.4 |
| 1986 ❄️ | 19.5°C | 14.4°C | 9.3°C | 25.3°C | 4.1°C | 31 mm | 69% | 3.2 m/s | 4.6 |
| 1985 | 21.1°C | 15.7°C | 10.2°C | 26.5°C | 5.7°C | 46 mm | 67% | 3.6 m/s | 4.5 |
| 1984 | 20.6°C | 15.8°C | 10.9°C | 26.1°C | 5.8°C | 45 mm | 68% | 3.1 m/s | 4.4 |
| 1983 | 22.6°C | 17.3°C | 12.0°C | 27.6°C | 6.8°C | 53 mm | 70% | 3.2 m/s | — |
| 1982 | 23.2°C | 17.3°C | 11.5°C | 29.5°C | 7.9°C | 32 mm | 69% | 3.4 m/s | — |
| 1981 | 20.2°C | 15.4°C | 10.5°C | 26.5°C | 6.3°C | 58 mm | 71% | 3.5 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 22.1°C with lows near 10.9°C (mean 16.5°C), based on 45 years of NASA POWER data.
August averages 40 mm of rainfall in Kalbarri, a relatively wet time of year. The wettest on record was 148 mm in 1992.
The hottest August reached 33.1°C in 2023. The coldest dipped to 4.1°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1°C. Daytime highs moved from 21.5°C to 23°C and overnight lows from 11°C to 11.6°C over the same span.
August is one of the cooler months of the year in Kalbarri and a relatively wet time of year, so plan for around 22.1°C daytime highs and 10.9°C at night.
Not quite — August is the 2nd coolest month in Kalbarri, averaging 16.5°C.
For August in Kalbarri, pack light layers you can adjust through the day, with typical highs of 22.1°C and lows of 10.9°C.
Relative humidity in August averages 66% — moderately humid.
Average wind speed in August is 3.5 m/s. The windiest August on record averaged 4.1 m/s (2022).
The wettest August on record was 1992 with 148 mm. On average, August sees 40 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 Kalbarri 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.
