August is one of the cooler months of the year in Invercargill, with average highs near 10.2°C and lows around 6.2°C (mean 8.2°C). It is one of the drier months, averaging 87 mm of rainfall and 83% relative humidity across the period.
August is one of the cooler months of the year in Invercargill. Across 45 years of records, the warmest Augusts in Invercargill were 2005, 2009 and 2013 — when the month averaged 9.4°C — while the coldest were 1992 and 2004 at 6.4°C. Typical August days reach 10.2°C with nights near 6.2°C. The long-term trend is warming, about 0.2°C per decade.
August is one of the drier months in Invercargill, averaging 87 mm of rainfall. The wettest August on record was 1995 with 155 mm, while the driest was 1989 at 23 mm.
Relative humidity in Invercargill during August averages 83%. The most humid August was 2010 at 86%, and the least humid was 1998 at 80%.
August receives about 2 kWh/m²/day of solar energy in Invercargill. The sunniest August was 1989 at 2.3 kWh/m²/day, and the cloudiest was 2002 at 1.7.
Average wind speed in Invercargill during August is 4.2 m/s. The windiest August was 1994 at 5.6 m/s, while the calmest was 1989 at 2.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 8.2°C | 7.7°C | 8.2°C | 8.4°C | 8.7°C | +0.5°C |
| Avg High | 10.4°C | 9.6°C | 10.1°C | 10.4°C | 10.7°C | +0.3°C |
| Avg Low | 6.1°C | 5.8°C | 6.3°C | 6.4°C | 6.6°C | +0.5°C |
| Avg Rain | 74 mm | 96 mm | 91 mm | 81 mm | 97 mm | +23 mm |
August temperatures in Invercargill have risen by about 0.4°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 1.4°C (1990) to a record high of 16°C (2014).
Rainfall in August is one of the drier months, averaging 87 mm, with a wettest year of 155 mm.
A quieter season to visit Invercargill
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Invercargill. That said, August — with days averaging 10.2°C and nights around 6.2°C (mean 8.2°C) and higher rainfall (87 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 | 10.5°C | 8.5°C | 6.5°C | 13.7°C | 3.6°C | 76 mm | 82% | 3.7 m/s | 2.2 |
| 2024 | 10.6°C | 8.7°C | 6.7°C | 14.2°C | 2.3°C | 93 mm | 83% | 4.1 m/s | 2.1 |
| 2023 | 10.1°C | 8.2°C | 6.3°C | 13.6°C | 4.2°C | 89 mm | 84% | 4 m/s | 1.9 |
| 2022 | 11.1°C | 8.9°C | 6.7°C | 14.6°C | 1.8°C | 102 mm | 83% | 3.6 m/s | 2.2 |
| 2021 | 10.6°C | 8.5°C | 6.4°C | 15.0°C | 3.1°C | 134 mm | 84% | 4.3 m/s | 1.9 |
| 2020 | 11.0°C | 9.1°C | 7.1°C | 15.1°C | 4.0°C | 87 mm | 83% | 4 m/s | 2 |
| 2019 | 10.0°C | 8.3°C | 6.7°C | 12.9°C | 4.0°C | 139 mm | 82% | 5.4 m/s | 2 |
| 2018 | 10.8°C | 8.9°C | 6.9°C | 14.1°C | 3.7°C | 50 mm | 84% | 3.3 m/s | 1.9 |
| 2017 | 10.8°C | 8.8°C | 6.7°C | 13.7°C | 2.2°C | 82 mm | 84% | 3.4 m/s | 2 |
| 2016 | 10.1°C | 8.1°C | 6.1°C | 14.1°C | 1.7°C | 46 mm | 83% | 3.4 m/s | 2.1 |
| 2015 | 9.2°C | 7.2°C | 5.2°C | 12.3°C | 1.9°C | 102 mm | 82% | 3.8 m/s | 2 |
| 2014 | 10.2°C | 8.3°C | 6.4°C | 16.0°C | 3.9°C | 110 mm | 83% | 4.4 m/s | 2 |
| 2013 | 11.5°C | 9.4°C | 7.4°C | 14.5°C | 5.1°C | 67 mm | 83% | 3.6 m/s | 2 |
| 2012 | 11.3°C | 8.9°C | 6.5°C | 14.5°C | 2.7°C | 41 mm | 85% | 3.4 m/s | 2.2 |
| 2011 | 9.6°C | 7.8°C | 5.9°C | 13.3°C | 1.9°C | 83 mm | 84% | 4.7 m/s | 1.9 |
| 2010 | 10.4°C | 8.2°C | 6.1°C | 15.2°C | 2.2°C | 94 mm | 86% | 3.3 m/s | 2 |
| 2009 | 11.3°C | 9.4°C | 7.5°C | 15.0°C | 5.0°C | 92 mm | 82% | 4.1 m/s | 2 |
| 2008 | 9.1°C | 7.3°C | 5.4°C | 13.7°C | 2.1°C | 95 mm | 84% | 3.8 m/s | 2.1 |
| 2007 | 9.7°C | 7.9°C | 6.2°C | 13.5°C | 2.2°C | 114 mm | 83% | 4.4 m/s | 1.9 |
| 2006 | 9.6°C | 7.8°C | 6.0°C | 12.8°C | 2.3°C | 90 mm | 83% | 4.3 m/s | 2.1 |
| 2005 🔥 | 11.4°C | 9.4°C | 7.4°C | 15.1°C | 3.7°C | 78 mm | 83% | 4.2 m/s | 1.9 |
| 2004 | 8.5°C | 6.4°C | 4.4°C | 12.1°C | 2.6°C | 133 mm | 84% | 4.1 m/s | 2 |
| 2003 | 10.4°C | 8.1°C | 5.8°C | 13.4°C | 2.6°C | 77 mm | 84% | 4.1 m/s | 2.1 |
| 2002 | 10.4°C | 8.5°C | 6.6°C | 13.2°C | 1.4°C | 100 mm | 84% | 4.8 m/s | 1.7 |
| 2001 | 10.7°C | 8.7°C | 6.7°C | 13.7°C | 2.8°C | 80 mm | 84% | 3.9 m/s | 1.9 |
| 2000 | 10.0°C | 8.3°C | 6.5°C | 14.2°C | 3.4°C | 55 mm | 83% | 4.8 m/s | 1.8 |
| 1999 | 10.3°C | 8.2°C | 6.1°C | 13.9°C | 4.2°C | 80 mm | 84% | 4.1 m/s | 2 |
| 1998 | 9.5°C | 7.6°C | 5.8°C | 13.6°C | 2.9°C | 76 mm | 80% | 4.9 m/s | 1.9 |
| 1997 | 9.6°C | 7.7°C | 5.8°C | 13.2°C | 2.7°C | 67 mm | 82% | 4.5 m/s | 2 |
| 1996 | 9.1°C | 7.1°C | 5.1°C | 12.2°C | 2.6°C | 83 mm | 84% | 4 m/s | 2 |
| 1995 🌧️ | 9.4°C | 7.4°C | 5.5°C | 14.5°C | 2.2°C | 155 mm | 83% | 5.2 m/s | 2.1 |
| 1994 | 9.8°C | 8.1°C | 6.4°C | 13.0°C | 3.4°C | 141 mm | 84% | 5.6 m/s | 2 |
| 1993 | 9.6°C | 7.7°C | 5.7°C | 13.3°C | 2.7°C | 113 mm | 81% | 4.4 m/s | 2.1 |
| 1992 ❄️ | 8.0°C | 6.4°C | 4.8°C | 12.6°C | 2.1°C | 114 mm | 83% | 4.9 m/s | 1.9 |
| 1991 | 10.3°C | 8.4°C | 6.4°C | 13.9°C | 3.3°C | 95 mm | 83% | 4.4 m/s | 1.9 |
| 1990 | 10.4°C | 8.2°C | 6.1°C | 13.5°C | 1.4°C | 32 mm | 82% | 4.1 m/s | 2.2 |
| 1989 | 11.2°C | 8.9°C | 6.6°C | 14.3°C | 3.4°C | 23 mm | 82% | 2.6 m/s | 2.3 |
| 1988 | 9.7°C | 7.9°C | 6.0°C | 13.1°C | 2.9°C | 94 mm | 83% | 4.9 m/s | 1.9 |
| 1987 | 10.8°C | 8.9°C | 7.0°C | 13.4°C | 4.8°C | 61 mm | 84% | 3.9 m/s | 2 |
| 1986 | 9.7°C | 7.4°C | 5.2°C | 13.7°C | 2.0°C | 61 mm | 83% | 3.9 m/s | 2.2 |
| 1985 | 10.5°C | 8.5°C | 6.4°C | 13.7°C | 4.0°C | 77 mm | 81% | 3.9 m/s | 2.1 |
| 1984 | 11.1°C | 8.6°C | 6.1°C | 14.3°C | 2.7°C | 89 mm | 81% | 3.9 m/s | 2.2 |
| 1983 | 10.2°C | 8.2°C | 6.3°C | 12.9°C | 3.5°C | 55 mm | 83% | 4.1 m/s | — |
| 1982 | 10.6°C | 8.6°C | 6.5°C | 13.5°C | 3.2°C | 140 mm | 82% | 5.4 m/s | — |
| 1981 | 9.4°C | 7.2°C | 4.9°C | 12.0°C | 2.1°C | 62 mm | 81% | 3.6 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 10.2°C with lows near 6.2°C (mean 8.2°C), based on 45 years of NASA POWER data.
August averages 87 mm of rainfall in Invercargill, one of the drier months. The wettest on record was 155 mm in 1995.
The hottest August reached 16°C in 2014. The coldest dipped to 1.4°C in 1990.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 0.4°C. Daytime highs moved from 10.4°C to 10.6°C and overnight lows from 6°C to 6.5°C over the same span.
August is one of the cooler months of the year in Invercargill and one of the drier months, so plan for around 10.2°C daytime highs and 6.2°C at night.
Not quite — August is the 3rd coolest month in Invercargill, averaging 8.2°C.
For August in Invercargill, pack warm layers and a jacket for chilly mornings, with typical highs of 10.2°C and lows of 6.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 83% — quite humid.
Average wind speed in August is 4.2 m/s. The windiest August on record averaged 5.6 m/s (1994).
The wettest August on record was 1995 with 155 mm. On average, August sees 87 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 Invercargill 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.
