August is one of the cooler months of the year in Napier, with average highs near 13.3°C and lows around 6.5°C (mean 9.9°C). It is about average for rainfall, averaging 70 mm of rainfall and 82% relative humidity across the period.
August is one of the cooler months of the year in Napier. Across 45 years of records, the warmest August in Napier was 2022 — when the month averaged 11.2°C — while the coldest was 1993 at 8.5°C. Typical August days reach 13.3°C with nights near 6.5°C. The long-term trend is warming, about 0.2°C per decade.
August is about average for rainfall in Napier, averaging 70 mm of rainfall. The wettest August on record was 1990 with 175 mm, while the driest was 1983 at 25 mm.
Relative humidity in Napier during August averages 82%. The most humid August was 2010 at 86%, and the least humid was 2019 at 79%.
August receives about 2.7 kWh/m²/day of solar energy in Napier. The sunniest August was 2005 at 3.1 kWh/m²/day, and the cloudiest was 2010 at 2.3.
Average wind speed in Napier during August is 2.9 m/s. The windiest August was 2004 at 3.8 m/s, while the calmest was 1987 at 2.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 9.9°C | 9.5°C | 10.1°C | 10.1°C | 10.3°C | +0.4°C |
| Avg High | 13.2°C | 12.9°C | 13.5°C | 13.5°C | 13.8°C | +0.6°C |
| Avg Low | 6.5°C | 6.1°C | 6.7°C | 6.7°C | 6.8°C | +0.3°C |
| Avg Rain | 63 mm | 70 mm | 64 mm | 82 mm | 69 mm | +6 mm |
August temperatures in Napier have risen by about 0.6°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 0.9°C (1994) to a record high of 19.4°C (2022).
Rainfall in August is about average for rainfall, averaging 70 mm, with a wettest year of 175 mm.
A quieter season to visit Napier
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Napier. That said, August — with days averaging 13.3°C and nights around 6.5°C (mean 9.9°C) and moderate rainfall (70 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 | 12.6°C | 9.8°C | 7.0°C | 17.4°C | 4.3°C | 64 mm | 84% | 3.2 m/s | 2.7 |
| 2024 | 14.3°C | 10.7°C | 7.0°C | 18.0°C | 3.4°C | 69 mm | 82% | 2.6 m/s | 2.7 |
| 2023 | 13.0°C | 9.4°C | 5.7°C | 16.0°C | 2.3°C | 46 mm | 80% | 2.8 m/s | 2.8 |
| 2022 🔥 | 14.5°C | 11.2°C | 7.9°C | 19.4°C | 3.0°C | 133 mm | 83% | 2.7 m/s | 2.5 |
| 2021 | 14.1°C | 10.2°C | 6.3°C | 18.0°C | 3.0°C | 62 mm | 80% | 2.9 m/s | 2.9 |
| 2020 | 14.1°C | 10.6°C | 7.0°C | 19.3°C | 3.5°C | 43 mm | 81% | 2.6 m/s | 2.7 |
| 2019 | 13.7°C | 10.2°C | 6.7°C | 16.3°C | 3.4°C | 52 mm | 79% | 3.3 m/s | 2.7 |
| 2018 | 14.4°C | 10.9°C | 7.3°C | 17.4°C | 3.9°C | 92 mm | 85% | 2.6 m/s | 2.4 |
| 2017 | 14.3°C | 10.8°C | 7.3°C | 18.5°C | 3.9°C | 74 mm | 84% | 2.5 m/s | 2.6 |
| 2016 | 12.8°C | 9.6°C | 6.3°C | 18.8°C | 3.1°C | 134 mm | 83% | 2.8 m/s | 2.7 |
| 2015 | 13.0°C | 9.5°C | 6.0°C | 18.6°C | 1.8°C | 64 mm | 82% | 2.8 m/s | 2.7 |
| 2014 | 12.6°C | 9.5°C | 6.3°C | 18.1°C | 2.9°C | 83 mm | 81% | 3.3 m/s | 2.5 |
| 2013 | 14.3°C | 11.1°C | 7.9°C | 17.5°C | 5.2°C | 94 mm | 84% | 2.8 m/s | 2.5 |
| 2012 | 13.5°C | 10.3°C | 7.0°C | 16.6°C | 4.2°C | 80 mm | 85% | 2.4 m/s | 2.5 |
| 2011 | 12.9°C | 9.2°C | 5.4°C | 17.7°C | 1.5°C | 43 mm | 82% | 2.8 m/s | 2.8 |
| 2010 | 13.6°C | 10.3°C | 7.1°C | 17.0°C | 1.7°C | 100 mm | 86% | 2.5 m/s | 2.3 |
| 2009 | 14.1°C | 10.7°C | 7.2°C | 18.4°C | 3.5°C | 56 mm | 83% | 2.9 m/s | 2.7 |
| 2008 | 12.9°C | 9.6°C | 6.3°C | 16.1°C | 2.3°C | 60 mm | 83% | 3.3 m/s | 2.7 |
| 2007 | 13.8°C | 10.3°C | 6.8°C | 16.3°C | 3.3°C | 69 mm | 81% | 3.2 m/s | 2.7 |
| 2006 | 13.5°C | 9.9°C | 6.3°C | 18.0°C | 3.0°C | 65 mm | 81% | 2.8 m/s | 2.9 |
| 2005 | 14.4°C | 10.8°C | 7.1°C | 18.4°C | 3.7°C | 31 mm | 81% | 2.3 m/s | 3.1 |
| 2004 | 11.9°C | 8.8°C | 5.8°C | 15.8°C | 2.6°C | 70 mm | 82% | 3.8 m/s | 2.7 |
| 2003 | 13.2°C | 10.4°C | 7.6°C | 15.1°C | 3.2°C | 137 mm | 84% | 3.2 m/s | 2.5 |
| 2002 | 13.5°C | 10.1°C | 6.6°C | 17.4°C | 3.5°C | 67 mm | 81% | 3.4 m/s | 2.5 |
| 2001 | 14.1°C | 10.6°C | 7.2°C | 17.7°C | 4.6°C | 54 mm | 81% | 3 m/s | 2.5 |
| 2000 | 13.4°C | 9.8°C | 6.2°C | 16.5°C | 3.3°C | 30 mm | 80% | 2.9 m/s | 2.8 |
| 1999 | 13.3°C | 9.8°C | 6.3°C | 18.2°C | 3.4°C | 37 mm | 81% | 3 m/s | 2.7 |
| 1998 | 13.2°C | 9.7°C | 6.2°C | 17.3°C | 2.1°C | 32 mm | 81% | 2.8 m/s | 2.6 |
| 1997 | 12.6°C | 9.5°C | 6.3°C | 16.2°C | 2.8°C | 82 mm | 83% | 3.3 m/s | 2.6 |
| 1996 | 12.4°C | 8.9°C | 5.4°C | 16.3°C | 1.5°C | 77 mm | 82% | 3.5 m/s | 2.6 |
| 1995 | 12.3°C | 9.0°C | 5.8°C | 15.3°C | 3.5°C | 86 mm | 82% | 3.3 m/s | 2.7 |
| 1994 | 13.8°C | 9.7°C | 5.5°C | 18.3°C | 0.9°C | 30 mm | 81% | 2.5 m/s | 2.9 |
| 1993 ❄️ | 11.8°C | 8.5°C | 5.2°C | 16.6°C | 2.1°C | 87 mm | 82% | 2.9 m/s | 2.9 |
| 1992 | 12.5°C | 9.0°C | 5.4°C | 17.4°C | 2.3°C | 58 mm | 80% | 3.7 m/s | 2.6 |
| 1991 | 13.8°C | 10.3°C | 6.8°C | 17.5°C | 3.7°C | 39 mm | 83% | 2.9 m/s | 2.5 |
| 1990 🌧️ | 13.2°C | 10.5°C | 7.7°C | 15.5°C | 4.6°C | 175 mm | 82% | 2.8 m/s | 2.6 |
| 1989 | 12.7°C | 9.9°C | 7.2°C | 15.8°C | 4.5°C | 74 mm | 85% | 3.4 m/s | 2.7 |
| 1988 | 13.9°C | 10.0°C | 6.2°C | 17.6°C | 2.9°C | 59 mm | 81% | 2.9 m/s | 2.7 |
| 1987 | 14.5°C | 11.0°C | 7.4°C | 17.8°C | 2.9°C | 43 mm | 83% | 2.1 m/s | 2.9 |
| 1986 | 12.1°C | 9.1°C | 6.2°C | 16.2°C | 2.4°C | 85 mm | 83% | 2.7 m/s | 2.8 |
| 1985 | 13.0°C | 9.4°C | 5.9°C | 17.9°C | 2.9°C | 29 mm | 82% | 2.9 m/s | 2.8 |
| 1984 | 13.7°C | 10.3°C | 6.9°C | 17.9°C | 1.7°C | 61 mm | 81% | 3.3 m/s | 2.8 |
| 1983 | 13.5°C | 10.0°C | 6.5°C | 17.6°C | 3.4°C | 25 mm | 81% | 2.5 m/s | — |
| 1982 | 13.7°C | 9.6°C | 5.6°C | 16.9°C | 2.5°C | 37 mm | 80% | 2.6 m/s | — |
| 1981 | 12.1°C | 9.4°C | 6.8°C | 15.5°C | 3.0°C | 156 mm | 83% | 3.1 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 13.3°C with lows near 6.5°C (mean 9.9°C), based on 45 years of NASA POWER data.
August averages 70 mm of rainfall in Napier, about average for rainfall. The wettest on record was 175 mm in 1990.
The hottest August reached 19.4°C in 2022. The coldest dipped to 0.9°C in 1994.
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 13.2°C to 13.7°C and overnight lows from 6.3°C to 6.8°C over the same span.
August is one of the cooler months of the year in Napier and about average for rainfall, so plan for around 13.3°C daytime highs and 6.5°C at night.
Not quite — August is the 2nd coolest month in Napier, averaging 9.9°C.
For August in Napier, pack warm layers and a jacket for chilly mornings, with typical highs of 13.3°C and lows of 6.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 82% — quite humid.
Average wind speed in August is 2.9 m/s. The windiest August on record averaged 3.8 m/s (2004).
The wettest August on record was 1990 with 175 mm. On average, August sees 70 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 Napier 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.
