August is one of the cooler months of the year in Manukau City, with average highs near 14.1°C and lows around 9.5°C (mean 11.8°C). It is a relatively wet time of year, averaging 104 mm of rainfall and 83% relative humidity across the period.
August is one of the cooler months of the year in Manukau City. Across 45 years of records, the warmest August in Manukau City was 2022 — when the month averaged 12.8°C — while the coldest was 2004 at 10.4°C. Typical August days reach 14.1°C with nights near 9.5°C. The long-term August temperature trend is broadly flat.
August is a relatively wet time of year in Manukau City, averaging 104 mm of rainfall. The wettest August on record was 1992 with 211 mm, while the driest was 1993 at 7 mm.
Relative humidity in Manukau City during August averages 83%. The most humid August was 2010 at 87%, and the least humid was 1993 at 79%.
August receives about 2.9 kWh/m²/day of solar energy in Manukau City. The sunniest August was 2005 at 3.3 kWh/m²/day, and the cloudiest was 2010 at 2.5.
Average wind speed in Manukau City during August is 4.7 m/s. The windiest August was 1992 at 6.4 m/s, while the calmest was 1987 at 3.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 11.7°C | 11.4°C | 11.8°C | 11.9°C | 12.0°C | +0.3°C |
| Avg High | 14.0°C | 13.7°C | 14.2°C | 14.3°C | 14.3°C | +0.3°C |
| Avg Low | 9.4°C | 9.2°C | 9.5°C | 9.6°C | 9.7°C | +0.3°C |
| Avg Rain | 98 mm | 118 mm | 79 mm | 114 mm | 115 mm | +18 mm |
August temperatures in Manukau City have risen by about 0.3°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 3.2°C (2008) to a record high of 18.3°C (2009).
Rainfall in August is a relatively wet time of year, averaging 104 mm, with a wettest year of 211 mm.
A quieter season to visit Manukau City
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Manukau City. That said, August — with days averaging 14.1°C and nights around 9.5°C (mean 11.8°C) and higher rainfall (104 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 | 13.9°C | 11.4°C | 9.0°C | 16.0°C | 5.5°C | 121 mm | 82% | 4.6 m/s | 3.2 |
| 2024 | 14.6°C | 12.3°C | 10.0°C | 18.1°C | 6.1°C | 113 mm | 85% | 4.4 m/s | 3 |
| 2023 | 13.5°C | 11.1°C | 8.6°C | 15.2°C | 5.7°C | 78 mm | 82% | 3.9 m/s | 3.1 |
| 2022 🔥 | 15.1°C | 12.8°C | 10.5°C | 17.9°C | 5.4°C | 130 mm | 84% | 4.1 m/s | 2.8 |
| 2021 | 14.1°C | 11.9°C | 9.7°C | 16.4°C | 5.9°C | 109 mm | 84% | 4.9 m/s | 2.9 |
| 2020 | 14.8°C | 12.5°C | 10.3°C | 16.5°C | 6.2°C | 141 mm | 84% | 4.7 m/s | 2.9 |
| 2019 | 14.1°C | 12.1°C | 10.2°C | 17.5°C | 5.5°C | 144 mm | 83% | 5.8 m/s | 2.9 |
| 2018 | 14.6°C | 12.3°C | 10.0°C | 16.8°C | 7.5°C | 109 mm | 85% | 4 m/s | 3.1 |
| 2017 | 15.0°C | 12.6°C | 10.3°C | 16.6°C | 6.2°C | 134 mm | 86% | 4.1 m/s | 3 |
| 2016 | 14.0°C | 11.5°C | 9.0°C | 17.3°C | 5.7°C | 89 mm | 83% | 4.2 m/s | 2.9 |
| 2015 | 13.8°C | 11.4°C | 9.0°C | 16.1°C | 3.6°C | 119 mm | 85% | 4.1 m/s | 2.9 |
| 2014 | 14.1°C | 11.5°C | 9.0°C | 17.9°C | 4.7°C | 105 mm | 81% | 4.9 m/s | 2.8 |
| 2013 | 14.8°C | 12.6°C | 10.4°C | 16.9°C | 6.9°C | 110 mm | 85% | 4.5 m/s | 2.7 |
| 2012 | 14.6°C | 12.2°C | 9.8°C | 16.2°C | 7.4°C | 121 mm | 85% | 3.9 m/s | 3 |
| 2011 | 13.5°C | 10.9°C | 8.3°C | 18.0°C | 3.9°C | 39 mm | 82% | 3.8 m/s | 3.1 |
| 2010 | 14.2°C | 12.3°C | 10.4°C | 16.6°C | 5.6°C | 173 mm | 87% | 4.8 m/s | 2.5 |
| 2009 | 14.9°C | 12.7°C | 10.4°C | 18.3°C | 7.5°C | 74 mm | 85% | 4.9 m/s | 2.9 |
| 2008 | 13.6°C | 11.6°C | 9.5°C | 15.9°C | 3.2°C | 121 mm | 83% | 5.3 m/s | 2.9 |
| 2007 | 14.2°C | 12.1°C | 10.0°C | 16.7°C | 6.0°C | 82 mm | 83% | 5.2 m/s | 2.8 |
| 2006 | 13.9°C | 11.6°C | 9.3°C | 16.2°C | 5.4°C | 102 mm | 83% | 4.4 m/s | 2.9 |
| 2005 | 15.0°C | 12.3°C | 9.6°C | 17.7°C | 6.5°C | 49 mm | 81% | 3.4 m/s | 3.3 |
| 2004 ❄️ | 12.8°C | 10.4°C | 7.9°C | 15.2°C | 3.7°C | 73 mm | 81% | 5 m/s | 3.1 |
| 2003 | 14.3°C | 11.9°C | 9.6°C | 16.2°C | 6.4°C | 63 mm | 83% | 4.4 m/s | 2.8 |
| 2002 | 14.1°C | 11.8°C | 9.4°C | 15.9°C | 5.6°C | 52 mm | 82% | 5.2 m/s | 2.9 |
| 2001 | 14.5°C | 12.1°C | 9.7°C | 17.7°C | 6.7°C | 97 mm | 83% | 4.8 m/s | 2.9 |
| 2000 | 14.4°C | 12.0°C | 9.6°C | 16.4°C | 6.2°C | 78 mm | 82% | 4.2 m/s | 3 |
| 1999 | 14.2°C | 11.6°C | 9.0°C | 16.4°C | 5.1°C | 96 mm | 81% | 4.4 m/s | 3 |
| 1998 | 14.3°C | 12.1°C | 9.9°C | 16.9°C | 6.1°C | 109 mm | 81% | 4.9 m/s | 2.6 |
| 1997 | 13.4°C | 10.9°C | 8.5°C | 15.6°C | 5.3°C | 64 mm | 83% | 5.2 m/s | 2.8 |
| 1996 | 13.3°C | 11.3°C | 9.3°C | 16.2°C | 4.0°C | 149 mm | 82% | 5.6 m/s | 2.7 |
| 1995 | 13.5°C | 10.9°C | 8.3°C | 15.1°C | 4.7°C | 90 mm | 84% | 4.8 m/s | 2.9 |
| 1994 | 13.8°C | 11.4°C | 9.0°C | 15.7°C | 6.4°C | 106 mm | 82% | 4.5 m/s | 3 |
| 1993 | 13.6°C | 11.2°C | 8.7°C | 15.0°C | 6.0°C | 7 mm | 79% | 4.9 m/s | 2.8 |
| 1992 🌧️ | 12.7°C | 10.7°C | 8.8°C | 15.3°C | 4.1°C | 211 mm | 82% | 6.4 m/s | 2.8 |
| 1991 | 14.0°C | 12.0°C | 10.1°C | 16.6°C | 7.4°C | 171 mm | 85% | 5.6 m/s | 2.8 |
| 1990 | 14.2°C | 12.1°C | 9.9°C | 15.9°C | 7.0°C | 178 mm | 83% | 4.7 m/s | 2.6 |
| 1989 | 14.1°C | 11.8°C | 9.5°C | 17.2°C | 4.5°C | 96 mm | 82% | 5.4 m/s | 2.9 |
| 1988 | 14.3°C | 12.1°C | 10.0°C | 16.6°C | 7.1°C | 130 mm | 84% | 5.1 m/s | 2.8 |
| 1987 | 14.9°C | 12.4°C | 9.9°C | 16.9°C | 7.8°C | 71 mm | 84% | 3.3 m/s | 3.1 |
| 1986 | 13.4°C | 11.0°C | 8.7°C | 16.2°C | 5.4°C | 177 mm | 81% | 4.1 m/s | 3 |
| 1985 | 13.8°C | 11.5°C | 9.1°C | 15.7°C | 5.2°C | 84 mm | 81% | 4.7 m/s | 3 |
| 1984 | 14.4°C | 12.4°C | 10.4°C | 17.2°C | 6.5°C | 128 mm | 82% | 5.1 m/s | 2.8 |
| 1983 | 14.0°C | 11.4°C | 8.8°C | 16.3°C | 5.2°C | 53 mm | 84% | 4.4 m/s | — |
| 1982 | 14.0°C | 11.6°C | 9.2°C | 15.6°C | 4.4°C | 29 mm | 81% | 4.2 m/s | — |
| 1981 | 13.4°C | 11.1°C | 8.9°C | 15.7°C | 5.2°C | 111 mm | 83% | 4.8 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 14.1°C with lows near 9.5°C (mean 11.8°C), based on 45 years of NASA POWER data.
August averages 104 mm of rainfall in Manukau City, a relatively wet time of year. The wettest on record was 211 mm in 1992.
The hottest August reached 18.3°C in 2009. The coldest dipped to 3.2°C in 2008.
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 13.9°C to 14.2°C and overnight lows from 9.3°C to 9.6°C over the same span.
August is one of the cooler months of the year in Manukau City and a relatively wet time of year, so plan for around 14.1°C daytime highs and 9.5°C at night.
Not quite — August is the 2nd coolest month in Manukau City, averaging 11.8°C.
For August in Manukau City, pack light layers you can adjust through the day, with typical highs of 14.1°C and lows of 9.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 83% — quite humid.
Average wind speed in August is 4.7 m/s. The windiest August on record averaged 6.4 m/s (1992).
The wettest August on record was 1992 with 211 mm. On average, August sees 104 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 Manukau City 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.
