August is one of the cooler months of the year in Kiama, with average highs near 14.8°C and lows around 6.3°C (mean 10.6°C). It is one of the drier months, averaging 71 mm of rainfall and 75% relative humidity across the period.
August is one of the cooler months of the year in Kiama. Across 45 years of records, the warmest August in Kiama was 2023 — when the month averaged 12.9°C — while the coldest was 1989 at 8.7°C. Typical August days reach 14.8°C with nights near 6.3°C. The long-term trend is warming, about 0.3°C per decade.
August is one of the drier months in Kiama, averaging 71 mm of rainfall. The wettest August on record was 1998 with 447 mm, while the driest was 1995 at 2 mm.
Relative humidity in Kiama during August averages 75%. The most humid August was 1998 at 87%, and the least humid was 2009 at 61%.
August receives about 3.6 kWh/m²/day of solar energy in Kiama. The sunniest August was 1995 at 4.1 kWh/m²/day, and the cloudiest was 2025 at 3.
Average wind speed in Kiama during August is 0.6 m/s. The windiest Augusts were 2010, 2017 and 2019, among others at 0.7 m/s, while the calmest were 2022, 2023 and 2024, among others at 0.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 10.0°C | 10.2°C | 10.7°C | 10.6°C | 11.5°C | +1.5°C |
| Avg High | 14.2°C | 14.4°C | 15.2°C | 14.9°C | 15.6°C | +1.4°C |
| Avg Low | 5.9°C | 6.0°C | 6.3°C | 6.3°C | 7.5°C | +1.6°C |
| Avg Rain | 78 mm | 102 mm | 39 mm | 65 mm | 71 mm | -6 mm |
August temperatures in Kiama have risen by about 1.7°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 0.5°C (2008) to a record high of 25.4°C (1995).
Rainfall in August is one of the drier months, averaging 71 mm, with a wettest year of 447 mm.
A quieter season to visit Kiama
If your dates are flexible, the more temperate months of January and December tend to be the most comfortable for visiting Kiama. That said, August — with days averaging 14.8°C and nights around 6.3°C (mean 10.6°C) and moderate rainfall (71 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 | 13.8°C | 10.8°C | 7.9°C | 19.4°C | 3.6°C | 141 mm | 85% | 0.6 m/s | 3 |
| 2024 | 16.8°C | 12.7°C | 8.7°C | 23.7°C | 3.9°C | 11 mm | 78% | 0.5 m/s | 3.5 |
| 2023 🔥 | 17.7°C | 12.9°C | 8.1°C | 22.9°C | 4.7°C | 53 mm | 73% | 0.5 m/s | 3.4 |
| 2022 | 14.6°C | 10.9°C | 7.3°C | 19.2°C | 4.2°C | 32 mm | 83% | 0.5 m/s | 3.2 |
| 2021 | 16.6°C | 11.8°C | 6.9°C | 22.8°C | 4.1°C | 52 mm | 70% | 0.6 m/s | 3.6 |
| 2020 | 14.0°C | 10.0°C | 6.1°C | 19.0°C | 2.8°C | 137 mm | 78% | 0.6 m/s | 3.6 |
| 2019 | 15.9°C | 11.0°C | 6.0°C | 21.0°C | 1.8°C | 39 mm | 64% | 0.7 m/s | 3.8 |
| 2018 | 15.4°C | 10.8°C | 6.2°C | 21.5°C | 1.4°C | 17 mm | 63% | 0.6 m/s | 3.6 |
| 2017 | 15.7°C | 11.0°C | 6.3°C | 21.6°C | 2.4°C | 19 mm | 64% | 0.7 m/s | 3.9 |
| 2016 | 14.5°C | 10.3°C | 6.2°C | 19.2°C | 2.5°C | 67 mm | 81% | 0.6 m/s | 3.4 |
| 2015 | 14.6°C | 10.3°C | 6.0°C | 22.2°C | 2.3°C | 145 mm | 78% | 0.6 m/s | 3.4 |
| 2014 | 14.2°C | 10.5°C | 6.8°C | 18.6°C | 2.2°C | 235 mm | 81% | 0.6 m/s | 3.3 |
| 2013 | 15.0°C | 10.9°C | 6.8°C | 19.8°C | 3.7°C | 11 mm | 73% | 0.6 m/s | 3.9 |
| 2012 | 14.7°C | 10.2°C | 5.7°C | 22.1°C | 2.7°C | 12 mm | 69% | 0.6 m/s | 3.9 |
| 2011 | 15.5°C | 11.6°C | 7.7°C | 20.6°C | 4.1°C | 65 mm | 82% | 0.5 m/s | 3.3 |
| 2010 | 13.6°C | 9.6°C | 5.7°C | 18.0°C | 2.1°C | 43 mm | 75% | 0.7 m/s | 3.8 |
| 2009 | 17.8°C | 12.3°C | 6.9°C | 24.0°C | 2.5°C | 7 mm | 61% | 0.6 m/s | 4 |
| 2008 | 13.3°C | 9.2°C | 5.1°C | 18.2°C | 0.5°C | 43 mm | 73% | 0.6 m/s | 3.5 |
| 2007 | 14.8°C | 11.3°C | 7.8°C | 20.8°C | 4.0°C | 63 mm | 80% | 0.6 m/s | 3.3 |
| 2006 | 14.8°C | 10.3°C | 5.9°C | 19.3°C | 3.1°C | 46 mm | 78% | 0.6 m/s | 3.7 |
| 2005 | 15.6°C | 10.6°C | 5.5°C | 21.2°C | 1.6°C | 14 mm | 70% | 0.6 m/s | 3.9 |
| 2004 | 15.7°C | 11.5°C | 7.3°C | 24.0°C | 3.8°C | 45 mm | 71% | 0.6 m/s | 3.5 |
| 2003 | 14.3°C | 10.1°C | 5.9°C | 19.1°C | 1.7°C | 43 mm | 76% | 0.6 m/s | 3.6 |
| 2002 | 16.7°C | 11.3°C | 6.0°C | 22.3°C | 3.5°C | 16 mm | 68% | 0.6 m/s | 3.8 |
| 2001 | 14.5°C | 10.5°C | 6.5°C | 19.5°C | 1.9°C | 83 mm | 73% | 0.7 m/s | 3.5 |
| 2000 | 14.4°C | 10.3°C | 6.2°C | 17.1°C | 3.5°C | 27 mm | 76% | 0.6 m/s | 3.4 |
| 1999 | 14.7°C | 10.5°C | 6.4°C | 18.8°C | 1.4°C | 44 mm | 81% | 0.6 m/s | 3.6 |
| 1998 🌧️ | 14.3°C | 11.2°C | 8.2°C | 17.9°C | 2.7°C | 447 mm | 87% | 0.6 m/s | 3.1 |
| 1997 | 14.1°C | 9.8°C | 5.5°C | 18.9°C | 2.0°C | 15 mm | 75% | 0.6 m/s | 3.8 |
| 1996 | 14.7°C | 10.3°C | 5.8°C | 20.0°C | 1.6°C | 134 mm | 72% | 0.6 m/s | 3.6 |
| 1995 | 17.3°C | 11.9°C | 6.5°C | 25.4°C | 1.1°C | 2 mm | 71% | 0.6 m/s | 4.1 |
| 1994 | 14.4°C | 9.7°C | 5.1°C | 21.4°C | 1.2°C | 13 mm | 70% | 0.6 m/s | 3.8 |
| 1993 | 15.5°C | 11.0°C | 6.5°C | 20.6°C | 2.1°C | 52 mm | 75% | 0.5 m/s | 3.7 |
| 1992 | 13.8°C | 9.6°C | 5.4°C | 20.9°C | 1.5°C | 32 mm | 74% | 0.6 m/s | 3.6 |
| 1991 | 13.2°C | 9.2°C | 5.2°C | 18.1°C | 1.5°C | 22 mm | 75% | 0.7 m/s | 3.9 |
| 1990 | 12.4°C | 9.1°C | 5.7°C | 17.9°C | 1.7°C | 252 mm | 81% | 0.7 m/s | 3.3 |
| 1989 ❄️ | 12.4°C | 8.7°C | 4.9°C | 16.4°C | 2.2°C | 32 mm | 80% | 0.6 m/s | 3.6 |
| 1988 | 14.5°C | 10.3°C | 6.2°C | 20.7°C | 2.7°C | 50 mm | 82% | 0.6 m/s | 3.6 |
| 1987 | 14.4°C | 10.7°C | 7.1°C | 18.3°C | 3.0°C | 212 mm | 86% | 0.6 m/s | 3.1 |
| 1986 | 13.6°C | 9.6°C | 5.6°C | 18.2°C | 2.4°C | 280 mm | 81% | 0.6 m/s | 3.5 |
| 1985 | 13.2°C | 9.3°C | 5.3°C | 17.8°C | 1.0°C | 33 mm | 81% | 0.6 m/s | 3.5 |
| 1984 | 13.7°C | 9.8°C | 5.9°C | 16.9°C | 3.2°C | 21 mm | 76% | 0.6 m/s | 3.7 |
| 1983 | 13.9°C | 9.9°C | 6.0°C | 17.3°C | 0.8°C | 36 mm | 82% | 0.6 m/s | — |
| 1982 | 18.1°C | 12.3°C | 6.5°C | 25.0°C | 3.0°C | 11 mm | 66% | 0.5 m/s | — |
| 1981 | 13.6°C | 9.4°C | 5.2°C | 17.7°C | 0.9°C | 25 mm | 72% | 0.7 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 14.8°C with lows near 6.3°C (mean 10.6°C), based on 45 years of NASA POWER data.
August averages 71 mm of rainfall in Kiama, one of the drier months. The wettest on record was 447 mm in 1998.
The hottest August reached 25.4°C in 1995. The coldest dipped to 0.5°C in 2008.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.7°C. Daytime highs moved from 14.5°C to 15.9°C and overnight lows from 5.8°C to 7.8°C over the same span.
August is one of the cooler months of the year in Kiama and one of the drier months, so plan for around 14.8°C daytime highs and 6.3°C at night.
Not quite — August is the 3rd coolest month in Kiama, averaging 10.6°C.
For August in Kiama, pack warm layers and a jacket for chilly mornings, with typical highs of 14.8°C and lows of 6.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 75% — quite humid.
Average wind speed in August is 0.6 m/s. The windiest August on record averaged 0.7 m/s (1981).
The wettest August on record was 1998 with 447 mm. On average, August sees 71 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 Kiama 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.
