August is one of the cooler months of the year in Karratha, with average highs near 25°C and lows around 19.6°C (mean 22.3°C). It is one of the drier months, averaging 3 mm of rainfall and 60% relative humidity across the period.
August is one of the cooler months of the year in Karratha. Across 45 years of records, the warmest August in Karratha was 1982 — when the month averaged 23.8°C — while the coldest was 1986 at 20.4°C. Typical August days reach 25°C with nights near 19.6°C. The long-term August temperature trend is broadly flat.
August is one of the drier months in Karratha, averaging 3 mm of rainfall. The wettest August on record was 1993 with 23 mm, while the driest were 2013, 2014 and 2015, among others at 0 mm.
Relative humidity in Karratha during August averages 60%. The most humid August was 2012 at 66%, and the least humid was 2004 at 53%.
August receives about 5.5 kWh/m²/day of solar energy in Karratha. The sunniest Augusts were 2000, 2004 and 2018, among others at 5.8 kWh/m²/day, and the cloudiest was 1992 at 5.
Average wind speed in Karratha during August is 4.4 m/s. The windiest August was 2004 at 5.1 m/s, while the calmest was 2012 at 3.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 22.2°C | 22.4°C | 22.0°C | 22.1°C | 22.9°C | +0.7°C |
| Avg High | 25.0°C | 25.1°C | 24.8°C | 24.8°C | 25.6°C | +0.6°C |
| Avg Low | 19.5°C | 19.7°C | 19.2°C | 19.5°C | 20.2°C | +0.7°C |
| Avg Rain | 2 mm | 8 mm | 1 mm | 1 mm | 6 mm | +4 mm |
August temperatures in Karratha have risen by about 0.3°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 12.8°C (1986) to a record high of 31°C (1998).
Rainfall in August is one of the drier months, averaging 3 mm, with a wettest year of 23 mm.
One of the best times to visit Karratha
August is one of the best times to visit Karratha. Expect days averaging 25°C and nights around 19.6°C (mean 22.3°C) — cooler than Karratha's yearly average — with low rainfall (3 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 24.9°C | 22.3°C | 19.8°C | 26.7°C | 16.3°C | 12 mm | 63% | 4.2 m/s | 5.2 |
| 2024 | 26.2°C | 23.3°C | 20.4°C | 30.9°C | 17.5°C | 13 mm | 62% | 3.8 m/s | 5.4 |
| 2023 | 26.3°C | 23.6°C | 20.9°C | 29.8°C | 18.2°C | 4 mm | 61% | 3.7 m/s | 5.4 |
| 2022 | 25.1°C | 22.5°C | 19.9°C | 26.8°C | 18.0°C | 3 mm | 59% | 4.6 m/s | 5.4 |
| 2021 | 25.5°C | 22.8°C | 20.1°C | 27.5°C | 16.8°C | 0 mm | 58% | 4.2 m/s | 5.6 |
| 2020 | 25.5°C | 22.9°C | 20.3°C | 30.8°C | 17.9°C | 2 mm | 58% | 4.3 m/s | 5.7 |
| 2019 | 24.8°C | 22.0°C | 19.2°C | 27.8°C | 17.2°C | 0 mm | 59% | 4.7 m/s | 5.6 |
| 2018 | 23.7°C | 20.7°C | 17.8°C | 26.1°C | 16.2°C | 0 mm | 56% | 5 m/s | 5.8 |
| 2017 | 25.3°C | 22.7°C | 20.1°C | 29.9°C | 16.8°C | 1 mm | 64% | 3.9 m/s | 5.6 |
| 2016 | 24.6°C | 22.2°C | 19.8°C | 26.4°C | 16.4°C | 5 mm | 61% | 4.4 m/s | 5.3 |
| 2015 | 25.2°C | 22.4°C | 19.7°C | 27.7°C | 18.0°C | 0 mm | 61% | 4.4 m/s | 5.4 |
| 2014 | 24.7°C | 21.9°C | 19.1°C | 26.7°C | 16.7°C | 0 mm | 56% | 4.5 m/s | 5.6 |
| 2013 | 25.0°C | 22.1°C | 19.2°C | 26.3°C | 16.6°C | 0 mm | 61% | 4.1 m/s | 5.7 |
| 2012 | 24.8°C | 22.1°C | 19.5°C | 28.9°C | 17.8°C | 0 mm | 66% | 3.5 m/s | 5.7 |
| 2011 | 25.4°C | 22.7°C | 20.0°C | 28.0°C | 18.1°C | 1 mm | 62% | 3.6 m/s | 5.6 |
| 2010 | 24.8°C | 22.4°C | 20.1°C | 27.0°C | 18.3°C | 2 mm | 59% | 4.6 m/s | 5.3 |
| 2009 | 24.5°C | 21.9°C | 19.3°C | 25.9°C | 17.3°C | 0 mm | 63% | 4.6 m/s | 5.6 |
| 2008 | 24.5°C | 21.7°C | 18.9°C | 26.7°C | 17.0°C | 0 mm | 55% | 5 m/s | 5.5 |
| 2007 | 25.0°C | 22.0°C | 19.0°C | 27.8°C | 17.5°C | 0 mm | 55% | 4.5 m/s | 5.7 |
| 2006 | 25.4°C | 22.5°C | 19.6°C | 27.6°C | 17.8°C | 0 mm | 62% | 3.7 m/s | 5.7 |
| 2005 | 24.4°C | 21.6°C | 18.8°C | 25.9°C | 16.3°C | 2 mm | 62% | 4.5 m/s | 5.4 |
| 2004 | 24.5°C | 21.5°C | 18.6°C | 26.7°C | 17.2°C | 0 mm | 53% | 5.1 m/s | 5.8 |
| 2003 | 24.2°C | 21.6°C | 19.1°C | 28.2°C | 15.7°C | 7 mm | 58% | 4.8 m/s | 5.4 |
| 2002 | 25.2°C | 22.4°C | 19.6°C | 28.4°C | 17.7°C | 0 mm | 60% | 4.5 m/s | 5.7 |
| 2001 | 25.8°C | 23.1°C | 20.4°C | 27.5°C | 18.5°C | 0 mm | 60% | 3.9 m/s | 5.7 |
| 2000 | 24.6°C | 21.5°C | 18.5°C | 27.8°C | 16.2°C | 1 mm | 57% | 4.5 m/s | 5.8 |
| 1999 | 25.8°C | 23.2°C | 20.6°C | 29.3°C | 19.4°C | 1 mm | 61% | 4.2 m/s | 5.5 |
| 1998 | 25.9°C | 22.7°C | 19.5°C | 31.0°C | 17.2°C | 12 mm | 65% | 3.8 m/s | 5.6 |
| 1997 | 24.4°C | 21.9°C | 19.3°C | 27.8°C | 16.3°C | 20 mm | 62% | 4.3 m/s | 5.3 |
| 1996 | 25.2°C | 22.6°C | 20.0°C | 27.6°C | 17.4°C | 2 mm | 61% | 4.4 m/s | 5.3 |
| 1995 | 25.6°C | 22.6°C | 19.5°C | 29.7°C | 16.4°C | 0 mm | 56% | 4.8 m/s | 5.8 |
| 1994 | 25.4°C | 22.6°C | 19.9°C | 27.6°C | 17.6°C | 0 mm | 59% | 4.3 m/s | 5.7 |
| 1993 🌧️ | 24.3°C | 21.4°C | 18.4°C | 27.8°C | 15.8°C | 23 mm | 61% | 4.8 m/s | 5.5 |
| 1992 | 24.1°C | 21.6°C | 19.1°C | 27.1°C | 15.8°C | 21 mm | 62% | 4.7 m/s | 5 |
| 1991 | 25.9°C | 23.1°C | 20.2°C | 27.2°C | 18.7°C | 0 mm | 57% | 4.4 m/s | 5.6 |
| 1990 | 24.6°C | 22.5°C | 20.4°C | 26.9°C | 17.7°C | 3 mm | 66% | 4.2 m/s | 5.2 |
| 1989 | 24.3°C | 21.7°C | 19.1°C | 26.1°C | 16.9°C | 0 mm | 57% | 4 m/s | 5.6 |
| 1988 | 25.5°C | 22.8°C | 20.0°C | 29.0°C | 18.3°C | 12 mm | 60% | 4.8 m/s | 5.3 |
| 1987 | 25.0°C | 22.1°C | 19.2°C | 27.0°C | 16.3°C | 0 mm | 56% | 4.8 m/s | 5.7 |
| 1986 ❄️ | 23.3°C | 20.4°C | 17.5°C | 26.7°C | 12.8°C | 0 mm | 55% | 4.8 m/s | 5.7 |
| 1985 | 24.9°C | 22.1°C | 19.4°C | 27.3°C | 17.4°C | 0 mm | 59% | 4.2 m/s | 5.7 |
| 1984 | 24.8°C | 21.8°C | 18.8°C | 27.1°C | 15.3°C | 5 mm | 57% | 4.2 m/s | 5.3 |
| 1983 | 25.5°C | 22.8°C | 20.2°C | 27.5°C | 18.0°C | 2 mm | 60% | 4.3 m/s | — |
| 1982 🔥 | 26.5°C | 23.8°C | 21.1°C | 30.8°C | 18.5°C | 1 mm | 59% | 3.8 m/s | — |
| 1981 | 25.4°C | 22.7°C | 20.1°C | 27.0°C | 17.3°C | 1 mm | 62% | 4.5 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 25°C with lows near 19.6°C (mean 22.3°C), based on 45 years of NASA POWER data.
August averages 3 mm of rainfall in Karratha, one of the drier months. The wettest on record was 23 mm in 1993.
The hottest August reached 31°C in 1998. The coldest dipped to 12.8°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 0.3°C. Daytime highs moved from 25.4°C to 25.6°C and overnight lows from 19.9°C to 20.2°C over the same span.
August is one of the cooler months of the year in Karratha and one of the drier months, so plan for around 25°C daytime highs and 19.6°C at night.
Not quite — August is the 2nd coolest month in Karratha, averaging 22.3°C.
For August in Karratha, pack light layers you can adjust through the day, with typical highs of 25°C and lows of 19.6°C.
Relative humidity in August averages 60% — moderately humid.
Average wind speed in August is 4.4 m/s. The windiest August on record averaged 5.1 m/s (2004).
The wettest August on record was 1993 with 23 mm. On average, August sees 3 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 Karratha 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.
