August is one of the cooler months of the year in Timaru, with average highs near 10°C and lows around 5.4°C (mean 7.7°C). It is about average for rainfall, averaging 54 mm of rainfall and 82% relative humidity across the period.
August is one of the cooler months of the year in Timaru. Across 45 years of records, the warmest August in Timaru was 2020 — when the month averaged 9.2°C — while the coldest was 1992 at 6.2°C. Typical August days reach 10°C with nights near 5.4°C. The long-term trend is warming, about 0.2°C per decade.
August is about average for rainfall in Timaru, averaging 54 mm of rainfall. The wettest August on record was 1992 with 157 mm, while the driest was 2023 at 19 mm.
Relative humidity in Timaru during August averages 82%. The most humid August was 2012 at 88%, and the least humid was 1998 at 77%.
August receives about 2.3 kWh/m²/day of solar energy in Timaru. The sunniest August was 2025 at 2.7 kWh/m²/day, and the cloudiest were 1992, 2010 and 2012 at 2.
Average wind speed in Timaru during August is 3.5 m/s. The windiest August was 1992 at 4.6 m/s, while the calmest was 1987 at 2.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 7.6°C | 7.2°C | 7.7°C | 7.9°C | 8.3°C | +0.7°C |
| Avg High | 9.8°C | 9.5°C | 10.1°C | 10.2°C | 10.8°C | +1°C |
| Avg Low | 5.4°C | 4.9°C | 5.4°C | 5.6°C | 5.9°C | +0.5°C |
| Avg Rain | 60 mm | 69 mm | 47 mm | 53 mm | 33 mm | -27 mm |
August temperatures in Timaru have risen by about 0.6°C between 1981–1985 and 2021–2025.
August has ranged from a record low of -1°C (2016) to a record high of 16.8°C (2024).
Rainfall in August is about average for rainfall, averaging 54 mm, with a wettest year of 157 mm.
A quieter season to visit Timaru
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Timaru. That said, August — with days averaging 10°C and nights around 5.4°C (mean 7.7°C) and moderate rainfall (54 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 | 10.3°C | 7.9°C | 5.4°C | 14.2°C | 3.9°C | 21 mm | 80% | 3.1 m/s | 2.7 |
| 2024 | 11.2°C | 8.4°C | 5.7°C | 16.8°C | 2.9°C | 47 mm | 80% | 3.3 m/s | 2.4 |
| 2023 | 10.5°C | 7.9°C | 5.3°C | 14.1°C | 3.0°C | 19 mm | 79% | 3.6 m/s | 2.5 |
| 2022 | 10.4°C | 8.3°C | 6.2°C | 14.1°C | 1.1°C | 54 mm | 84% | 2.9 m/s | 2.3 |
| 2021 | 10.6°C | 8.3°C | 6.0°C | 15.8°C | 2.9°C | 34 mm | 81% | 3.7 m/s | 2.3 |
| 2020 🔥 | 11.6°C | 9.2°C | 6.8°C | 15.5°C | 3.7°C | 27 mm | 81% | 3.1 m/s | 2.3 |
| 2019 | 10.8°C | 7.9°C | 5.1°C | 15.8°C | 3.1°C | 48 mm | 78% | 3.8 m/s | 2.5 |
| 2018 | 10.6°C | 8.4°C | 6.3°C | 15.1°C | 4.8°C | 28 mm | 85% | 2.7 m/s | 2.3 |
| 2017 | 10.9°C | 8.6°C | 6.3°C | 14.6°C | 3.6°C | 36 mm | 83% | 3.1 m/s | 2.3 |
| 2016 | 9.4°C | 7.0°C | 4.7°C | 14.2°C | -1.0°C | 46 mm | 81% | 3.1 m/s | 2.5 |
| 2015 | 9.1°C | 6.9°C | 4.6°C | 13.2°C | 2.2°C | 62 mm | 84% | 3.1 m/s | 2.3 |
| 2014 | 10.3°C | 7.8°C | 5.3°C | 15.2°C | 2.8°C | 22 mm | 80% | 3.5 m/s | 2.6 |
| 2013 | 11.2°C | 9.1°C | 7.0°C | 14.7°C | 4.0°C | 34 mm | 85% | 3.2 m/s | 2.3 |
| 2012 | 10.3°C | 8.4°C | 6.6°C | 14.7°C | 4.8°C | 120 mm | 88% | 3.3 m/s | 2 |
| 2011 | 10.0°C | 7.4°C | 4.7°C | 15.3°C | 1.0°C | 35 mm | 81% | 3.7 m/s | 2.5 |
| 2010 | 9.6°C | 7.7°C | 5.8°C | 13.8°C | 2.2°C | 97 mm | 86% | 3.6 m/s | 2 |
| 2009 | 11.3°C | 8.8°C | 6.3°C | 14.8°C | 3.1°C | 44 mm | 82% | 3.1 m/s | 2.3 |
| 2008 | 8.9°C | 6.8°C | 4.7°C | 13.0°C | 2.1°C | 46 mm | 82% | 3.4 m/s | 2.3 |
| 2007 | 10.1°C | 7.5°C | 4.9°C | 14.3°C | 2.0°C | 31 mm | 81% | 3.2 m/s | 2.4 |
| 2006 | 9.7°C | 7.4°C | 5.1°C | 14.5°C | 2.7°C | 43 mm | 81% | 3.5 m/s | 2.4 |
| 2005 | 11.7°C | 8.9°C | 6.1°C | 16.2°C | 3.1°C | 23 mm | 81% | 2.8 m/s | 2.3 |
| 2004 | 8.4°C | 6.4°C | 4.4°C | 13.3°C | 1.5°C | 69 mm | 82% | 4.5 m/s | 2.3 |
| 2003 | 9.8°C | 7.5°C | 5.3°C | 14.7°C | 3.9°C | 48 mm | 84% | 3.5 m/s | 2.2 |
| 2002 | 10.8°C | 8.1°C | 5.3°C | 15.3°C | 2.9°C | 33 mm | 80% | 4.2 m/s | 2.3 |
| 2001 | 10.7°C | 8.3°C | 6.0°C | 14.3°C | 3.0°C | 28 mm | 81% | 3.2 m/s | 2.3 |
| 2000 | 9.9°C | 7.7°C | 5.6°C | 14.8°C | 2.6°C | 109 mm | 81% | 4 m/s | 2.1 |
| 1999 | 10.0°C | 7.7°C | 5.3°C | 14.7°C | 3.4°C | 24 mm | 81% | 3.5 m/s | 2.1 |
| 1998 | 9.9°C | 7.4°C | 4.9°C | 14.1°C | 1.6°C | 33 mm | 77% | 3.7 m/s | 2.2 |
| 1997 | 9.5°C | 7.3°C | 5.0°C | 13.9°C | 2.8°C | 34 mm | 80% | 4.1 m/s | 2.2 |
| 1996 | 9.1°C | 6.8°C | 4.4°C | 11.9°C | 2.2°C | 51 mm | 80% | 3.5 m/s | 2.2 |
| 1995 | 9.0°C | 6.7°C | 4.3°C | 12.6°C | 1.4°C | 73 mm | 81% | 3.9 m/s | 2.5 |
| 1994 | 10.3°C | 7.7°C | 5.1°C | 13.9°C | 2.2°C | 69 mm | 80% | 3.5 m/s | 2.6 |
| 1993 | 9.5°C | 7.1°C | 4.6°C | 13.9°C | 2.2°C | 46 mm | 79% | 3.6 m/s | 2.6 |
| 1992 ❄️ 🌧️ | 8.1°C | 6.2°C | 4.3°C | 12.1°C | 2.5°C | 157 mm | 82% | 4.6 m/s | 2 |
| 1991 | 10.2°C | 7.9°C | 5.5°C | 13.0°C | 3.1°C | 97 mm | 82% | 3.9 m/s | 2.3 |
| 1990 | 9.4°C | 7.6°C | 5.7°C | 12.8°C | 3.9°C | 109 mm | 84% | 3.8 m/s | 2.1 |
| 1989 | 9.7°C | 7.8°C | 6.0°C | 13.0°C | 3.6°C | 52 mm | 86% | 3 m/s | 2.3 |
| 1988 | 10.2°C | 7.6°C | 4.9°C | 13.5°C | 2.1°C | 52 mm | 80% | 3.8 m/s | 2.4 |
| 1987 | 10.9°C | 8.6°C | 6.3°C | 13.4°C | 4.3°C | 46 mm | 85% | 2.5 m/s | 2.3 |
| 1986 | 8.3°C | 6.5°C | 4.8°C | 12.7°C | 3.0°C | 79 mm | 83% | 3.6 m/s | 2.4 |
| 1985 | 10.2°C | 7.9°C | 5.5°C | 14.7°C | 3.6°C | 64 mm | 80% | 3.7 m/s | 2.6 |
| 1984 | 9.8°C | 7.8°C | 5.7°C | 13.8°C | 2.3°C | 56 mm | 84% | 3.9 m/s | 2.5 |
| 1983 | 9.8°C | 7.4°C | 5.1°C | 13.4°C | 3.6°C | 64 mm | 83% | 3.2 m/s | — |
| 1982 | 11.1°C | 8.1°C | 5.0°C | 14.6°C | 2.8°C | 64 mm | 79% | 3.6 m/s | — |
| 1981 | 8.2°C | 6.6°C | 4.9°C | 11.1°C | 3.3°C | 69 mm | 83% | 3.5 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 10°C with lows near 5.4°C (mean 7.7°C), based on 45 years of NASA POWER data.
August averages 54 mm of rainfall in Timaru, about average for rainfall. The wettest on record was 157 mm in 1992.
The hottest August reached 16.8°C in 2024. The coldest dipped to -1°C in 2016.
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 9.8°C to 10.6°C and overnight lows from 5.2°C to 5.7°C over the same span.
August is one of the cooler months of the year in Timaru and about average for rainfall, so plan for around 10°C daytime highs and 5.4°C at night.
Not quite — August is the 2nd coolest month in Timaru, averaging 7.7°C.
For August in Timaru, pack warm layers and a jacket for chilly mornings, with typical highs of 10°C and lows of 5.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 82% — quite humid.
Average wind speed in August is 3.5 m/s. The windiest August on record averaged 4.6 m/s (1992).
The wettest August on record was 1992 with 157 mm. On average, August sees 54 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 Timaru 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.
