August is one of the cooler months of the year in Whyalla, with average highs near 17.4°C and lows around 8.3°C (mean 12.9°C). It is about average for rainfall, averaging 28 mm of rainfall and 68% relative humidity across the period.
August is one of the cooler months of the year in Whyalla. Across 45 years of records, the warmest August in Whyalla was 2024 — when the month averaged 15.5°C — while the coldest were 1989 and 2008 at 11.3°C. Typical August days reach 17.4°C with nights near 8.3°C. The long-term trend is warming, about 0.2°C per decade.
August is about average for rainfall in Whyalla, averaging 28 mm of rainfall. The wettest August on record was 1985 with 84 mm, while the driest was 2006 at 2 mm.
Relative humidity in Whyalla during August averages 68%. The most humid August was 2013 at 75%, and the least humid was 1982 at 56%.
August receives about 3.8 kWh/m²/day of solar energy in Whyalla. The sunniest August was 2007 at 4.2 kWh/m²/day, and the cloudiest were 1996, 2003 and 2013 at 3.5.
Average wind speed in Whyalla during August is 3.9 m/s. The windiest August was 1990 at 4.8 m/s, while the calmest were 1982, 2006 and 2014 at 3.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 12.6°C | 12.7°C | 12.9°C | 12.8°C | 13.6°C | +1°C |
| Avg High | 17.1°C | 17.2°C | 17.6°C | 17.3°C | 18.2°C | +1.1°C |
| Avg Low | 8.1°C | 8.2°C | 8.2°C | 8.3°C | 9.0°C | +0.9°C |
| Avg Rain | 35 mm | 29 mm | 29 mm | 25 mm | 20 mm | -14 mm |
August temperatures in Whyalla have risen by about 0.8°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 3.7°C (2014) to a record high of 27.1°C (1995).
Rainfall in August is about average for rainfall, averaging 28 mm, with a wettest year of 84 mm.
A quieter season to visit Whyalla
If your dates are flexible, the more temperate months of March and December tend to be the most comfortable for visiting Whyalla. That said, August — with days averaging 17.4°C and nights around 8.3°C (mean 12.9°C) and low rainfall (28 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 | 17.6°C | 13.0°C | 8.4°C | 25.0°C | 5.1°C | 16 mm | 67% | 3.9 m/s | 3.7 |
| 2024 🔥 | 20.3°C | 15.5°C | 10.6°C | 26.9°C | 6.9°C | 12 mm | 64% | 3.7 m/s | 3.8 |
| 2023 | 19.2°C | 14.3°C | 9.4°C | 25.7°C | 5.7°C | 23 mm | 67% | 3.2 m/s | 3.9 |
| 2022 | 17.3°C | 13.0°C | 8.6°C | 22.6°C | 6.2°C | 35 mm | 70% | 4.3 m/s | 3.6 |
| 2021 | 17.9°C | 13.2°C | 8.5°C | 24.7°C | 5.8°C | 12 mm | 68% | 3.5 m/s | 4.1 |
| 2020 | 16.8°C | 12.5°C | 8.2°C | 23.5°C | 4.9°C | 25 mm | 68% | 3.9 m/s | 3.6 |
| 2019 | 17.0°C | 12.3°C | 7.6°C | 22.3°C | 4.9°C | 13 mm | 66% | 3.9 m/s | 3.8 |
| 2018 | 18.1°C | 13.2°C | 8.4°C | 24.0°C | 5.8°C | 15 mm | 62% | 4.6 m/s | 3.8 |
| 2017 | 17.3°C | 12.9°C | 8.6°C | 23.9°C | 5.3°C | 20 mm | 66% | 3.9 m/s | 3.6 |
| 2016 | 17.9°C | 13.1°C | 8.4°C | 23.9°C | 5.5°C | 31 mm | 66% | 3.7 m/s | 3.9 |
| 2015 | 16.7°C | 12.5°C | 8.3°C | 21.5°C | 6.0°C | 41 mm | 74% | 3.6 m/s | 3.7 |
| 2014 | 17.2°C | 12.4°C | 7.6°C | 23.6°C | 3.7°C | 5 mm | 68% | 3.1 m/s | 4 |
| 2013 | 17.9°C | 13.4°C | 8.9°C | 24.7°C | 6.6°C | 26 mm | 75% | 3.8 m/s | 3.5 |
| 2012 | 16.6°C | 12.2°C | 7.9°C | 21.7°C | 4.9°C | 21 mm | 71% | 3.8 m/s | 3.6 |
| 2011 | 18.5°C | 14.0°C | 9.4°C | 24.5°C | 7.1°C | 31 mm | 71% | 3.4 m/s | 3.8 |
| 2010 | 15.7°C | 11.6°C | 7.6°C | 20.7°C | 5.4°C | 44 mm | 74% | 4.3 m/s | 3.6 |
| 2009 | 19.3°C | 14.3°C | 9.2°C | 26.0°C | 5.2°C | 18 mm | 67% | 3.9 m/s | 3.7 |
| 2008 | 15.3°C | 11.3°C | 7.3°C | 21.0°C | 5.0°C | 36 mm | 73% | 3.7 m/s | 3.8 |
| 2007 | 18.9°C | 13.6°C | 8.3°C | 27.1°C | 5.4°C | 10 mm | 65% | 3.7 m/s | 4.2 |
| 2006 | 18.9°C | 13.7°C | 8.4°C | 24.2°C | 6.2°C | 2 mm | 65% | 3.1 m/s | 4.1 |
| 2005 | 18.5°C | 13.6°C | 8.6°C | 25.6°C | 5.7°C | 28 mm | 65% | 4.1 m/s | 3.8 |
| 2004 | 17.5°C | 12.8°C | 8.2°C | 25.3°C | 5.8°C | 38 mm | 70% | 3.9 m/s | 3.8 |
| 2003 | 16.3°C | 11.8°C | 7.3°C | 21.9°C | 4.6°C | 53 mm | 68% | 4.4 m/s | 3.5 |
| 2002 | 17.4°C | 12.4°C | 7.5°C | 23.3°C | 4.2°C | 11 mm | 65% | 3.5 m/s | 4 |
| 2001 | 17.3°C | 12.8°C | 8.3°C | 22.5°C | 5.4°C | 39 mm | 69% | 4.5 m/s | 3.6 |
| 2000 | 17.0°C | 12.7°C | 8.4°C | 20.5°C | 5.9°C | 54 mm | 71% | 3.6 m/s | 3.6 |
| 1999 | 18.3°C | 13.1°C | 8.0°C | 24.7°C | 3.9°C | 21 mm | 65% | 3.6 m/s | 3.9 |
| 1998 | 17.6°C | 13.0°C | 8.4°C | 25.0°C | 5.3°C | 32 mm | 72% | 3.5 m/s | 3.6 |
| 1997 | 16.4°C | 12.1°C | 7.8°C | 21.1°C | 5.2°C | 39 mm | 66% | 3.6 m/s | 3.6 |
| 1996 | 16.3°C | 12.2°C | 8.0°C | 22.8°C | 5.2°C | 48 mm | 72% | 3.9 m/s | 3.5 |
| 1995 | 18.4°C | 13.5°C | 8.6°C | 27.1°C | 4.6°C | 14 mm | 67% | 3.5 m/s | 4 |
| 1994 | 16.7°C | 12.2°C | 7.6°C | 23.0°C | 4.3°C | 6 mm | 66% | 3.3 m/s | 4.1 |
| 1993 | 19.1°C | 14.0°C | 8.9°C | 24.3°C | 4.2°C | 23 mm | 62% | 4.1 m/s | 3.9 |
| 1992 | 16.4°C | 12.1°C | 7.8°C | 22.6°C | 5.0°C | 54 mm | 68% | 4.5 m/s | 3.8 |
| 1991 | 16.8°C | 12.5°C | 8.2°C | 21.9°C | 5.7°C | 21 mm | 70% | 4.6 m/s | 3.7 |
| 1990 | 16.2°C | 12.3°C | 8.4°C | 20.1°C | 7.0°C | 33 mm | 72% | 4.8 m/s | 3.6 |
| 1989 ❄️ | 15.1°C | 11.3°C | 7.4°C | 20.8°C | 4.4°C | 21 mm | 75% | 4.2 m/s | 4 |
| 1988 | 17.6°C | 13.0°C | 8.3°C | 25.0°C | 5.2°C | 7 mm | 66% | 3.8 m/s | 3.8 |
| 1987 | 16.5°C | 12.3°C | 8.2°C | 23.3°C | 5.6°C | 23 mm | 73% | 3.9 m/s | 3.7 |
| 1986 | 16.4°C | 12.3°C | 8.2°C | 21.7°C | 5.2°C | 54 mm | 71% | 4.2 m/s | 3.9 |
| 1985 🌧️ | 16.6°C | 12.4°C | 8.2°C | 23.5°C | 6.2°C | 84 mm | 71% | 4.3 m/s | 3.7 |
| 1984 | 16.4°C | 12.1°C | 7.8°C | 20.6°C | 4.9°C | 52 mm | 71% | 4.7 m/s | 3.9 |
| 1983 | 17.8°C | 12.9°C | 8.0°C | 22.8°C | 4.9°C | 29 mm | 69% | 3.6 m/s | — |
| 1982 | 20.8°C | 15.0°C | 9.2°C | 26.8°C | 4.9°C | 6 mm | 56% | 3.1 m/s | — |
| 1981 | 16.8°C | 12.4°C | 8.0°C | 20.0°C | 5.6°C | 35 mm | 72% | 4.6 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 17.4°C with lows near 8.3°C (mean 12.9°C), based on 45 years of NASA POWER data.
August averages 28 mm of rainfall in Whyalla, about average for rainfall. The wettest on record was 84 mm in 1985.
The hottest August reached 27.1°C in 1995. The coldest dipped to 3.7°C in 2014.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 0.8°C. Daytime highs moved from 17.7°C to 18.5°C and overnight lows from 8.2°C to 9.1°C over the same span.
August is one of the cooler months of the year in Whyalla and about average for rainfall, so plan for around 17.4°C daytime highs and 8.3°C at night.
Not quite — August is the 3rd coolest month in Whyalla, averaging 12.9°C.
For August in Whyalla, pack light layers you can adjust through the day, with typical highs of 17.4°C and lows of 8.3°C.
Relative humidity in August averages 68% — moderately humid.
Average wind speed in August is 3.9 m/s. The windiest August on record averaged 4.8 m/s (1990).
The wettest August on record was 1985 with 84 mm. On average, August sees 28 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 Whyalla 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.
