September is one of the cooler months of the year in Whakatane, with average highs near 14.8°C and lows around 8.3°C (mean 11.6°C). It is about average for rainfall, averaging 93 mm of rainfall and 83% relative humidity across the period.
September is one of the cooler months of the year in Whakatane. Across 45 years of records, the warmest Septembers in Whakatane were 1988, 2005 and 2023 — when the month averaged 12.5°C — while the coldest was 1992 at 9.7°C. Typical September days reach 14.8°C with nights near 8.3°C. The long-term September temperature trend is broadly flat.
September is about average for rainfall in Whakatane, averaging 93 mm of rainfall. The wettest September on record was 2022 with 230 mm, while the driest was 2011 at 36 mm.
Relative humidity in Whakatane during September averages 83%. The most humid September was 2017 at 87%, and the least humid were 2000 and 2002 at 78%.
September receives about 4 kWh/m²/day of solar energy in Whakatane. The sunniest September was 2008 at 4.5 kWh/m²/day, and the cloudiest was 2016 at 3.3.
Average wind speed in Whakatane during September is 1.7 m/s. The windiest Septembers were 1981 and 2010 at 2.1 m/s, while the calmest were 2007, 2009 and 2018, among others at 1.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 11.6°C | 11.0°C | 12.0°C | 11.5°C | 11.9°C | +0.3°C |
| Avg High | 14.9°C | 14.3°C | 15.3°C | 14.6°C | 15.1°C | +0.2°C |
| Avg Low | 8.4°C | 7.8°C | 8.6°C | 8.3°C | 8.7°C | +0.3°C |
| Avg Rain | 92 mm | 86 mm | 71 mm | 99 mm | 130 mm | +38 mm |
September temperatures in Whakatane have risen by about 0.6°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 2.3°C (1992) to a record high of 21°C (1999).
Rainfall in September is about average for rainfall, averaging 93 mm, with a wettest year of 230 mm.
A quieter season to visit Whakatane
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Whakatane. That said, September — with days averaging 14.8°C and nights around 8.3°C (mean 11.6°C) and higher rainfall (93 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 | 15.1°C | 11.9°C | 8.7°C | 18.1°C | 4.0°C | 103 mm | 82% | 1.9 m/s | 4.1 |
| 2024 | 15.6°C | 12.1°C | 8.5°C | 17.8°C | 4.2°C | 41 mm | 82% | 1.7 m/s | 4.3 |
| 2023 | 15.5°C | 12.5°C | 9.5°C | 20.2°C | 5.6°C | 213 mm | 85% | 1.8 m/s | 4.1 |
| 2022 🌧️ | 14.7°C | 12.0°C | 9.2°C | 17.5°C | 4.8°C | 230 mm | 83% | 1.6 m/s | 3.8 |
| 2021 | 14.7°C | 11.5°C | 8.3°C | 17.9°C | 5.2°C | 145 mm | 83% | 1.8 m/s | 3.8 |
| 2020 | 15.0°C | 11.4°C | 7.7°C | 17.3°C | 3.8°C | 45 mm | 81% | 1.9 m/s | 4.3 |
| 2019 | 15.0°C | 11.6°C | 8.2°C | 17.6°C | 5.6°C | 93 mm | 83% | 1.8 m/s | 4.1 |
| 2018 | 14.9°C | 11.6°C | 8.4°C | 19.0°C | 3.1°C | 81 mm | 84% | 1.5 m/s | 4.3 |
| 2017 | 14.6°C | 11.6°C | 8.6°C | 18.3°C | 4.8°C | 143 mm | 87% | 1.8 m/s | 3.6 |
| 2016 | 14.9°C | 12.1°C | 9.4°C | 16.8°C | 5.4°C | 115 mm | 86% | 1.7 m/s | 3.3 |
| 2015 | 14.3°C | 10.7°C | 7.1°C | 16.5°C | 2.9°C | 122 mm | 81% | 1.6 m/s | 4.1 |
| 2014 | 14.9°C | 11.8°C | 8.7°C | 18.2°C | 4.7°C | 91 mm | 83% | 1.7 m/s | 3.8 |
| 2013 | 14.7°C | 12.0°C | 9.2°C | 18.1°C | 4.6°C | 118 mm | 85% | 2 m/s | 3.8 |
| 2012 | 14.3°C | 11.2°C | 8.1°C | 18.8°C | 2.8°C | 70 mm | 80% | 1.9 m/s | 3.9 |
| 2011 | 14.2°C | 10.5°C | 6.8°C | 15.7°C | 3.6°C | 36 mm | 80% | 1.7 m/s | 4.3 |
| 2010 | 14.4°C | 11.7°C | 8.9°C | 17.6°C | 5.6°C | 119 mm | 85% | 2.1 m/s | 3.6 |
| 2009 | 15.2°C | 12.1°C | 8.9°C | 17.8°C | 4.4°C | 89 mm | 84% | 1.5 m/s | 4.1 |
| 2008 | 15.4°C | 12.0°C | 8.6°C | 18.9°C | 5.8°C | 47 mm | 83% | 1.6 m/s | 4.5 |
| 2007 | 14.7°C | 11.6°C | 8.5°C | 17.2°C | 3.9°C | 77 mm | 83% | 1.5 m/s | 3.9 |
| 2006 | 15.8°C | 12.2°C | 8.6°C | 19.2°C | 5.7°C | 58 mm | 83% | 1.5 m/s | 4.4 |
| 2005 | 15.8°C | 12.5°C | 9.2°C | 18.4°C | 3.1°C | 61 mm | 83% | 1.6 m/s | 4 |
| 2004 | 14.0°C | 10.7°C | 7.3°C | 16.4°C | 3.6°C | 66 mm | 81% | 1.9 m/s | 4 |
| 2003 | 15.2°C | 12.2°C | 9.3°C | 19.1°C | 5.8°C | 143 mm | 86% | 2 m/s | 3.9 |
| 2002 | 15.8°C | 12.1°C | 8.5°C | 18.3°C | 3.2°C | 57 mm | 78% | 1.8 m/s | 4.2 |
| 2001 | 15.6°C | 12.2°C | 8.9°C | 19.6°C | 5.7°C | 52 mm | 80% | 1.6 m/s | 4.2 |
| 2000 | 15.6°C | 12.1°C | 8.5°C | 18.9°C | 4.0°C | 63 mm | 78% | 1.7 m/s | 4.2 |
| 1999 | 15.8°C | 12.2°C | 8.5°C | 21.0°C | 4.7°C | 67 mm | 79% | 1.6 m/s | 4.3 |
| 1998 | 15.8°C | 12.2°C | 8.5°C | 18.0°C | 4.4°C | 38 mm | 79% | 1.8 m/s | 4 |
| 1997 | 13.6°C | 10.6°C | 7.6°C | 16.7°C | 3.1°C | 113 mm | 83% | 1.7 m/s | 3.7 |
| 1996 | 15.1°C | 12.0°C | 8.9°C | 18.1°C | 4.2°C | 112 mm | 86% | 1.7 m/s | 3.9 |
| 1995 | 14.5°C | 11.3°C | 8.1°C | 18.5°C | 4.0°C | 79 mm | 84% | 1.6 m/s | 4.3 |
| 1994 | 13.6°C | 10.3°C | 6.9°C | 15.9°C | 3.8°C | 109 mm | 84% | 2 m/s | 3.8 |
| 1993 | 13.2°C | 9.9°C | 6.6°C | 16.5°C | 3.9°C | 59 mm | 80% | 1.7 m/s | 4 |
| 1992 ❄️ | 12.8°C | 9.7°C | 6.7°C | 15.8°C | 2.3°C | 114 mm | 85% | 1.7 m/s | 3.9 |
| 1991 | 14.4°C | 11.5°C | 8.6°C | 16.2°C | 5.0°C | 70 mm | 84% | 1.7 m/s | 3.8 |
| 1990 | 13.8°C | 10.5°C | 7.1°C | 15.9°C | 3.6°C | 102 mm | 82% | 1.5 m/s | 4.3 |
| 1989 | 15.2°C | 12.2°C | 9.2°C | 18.2°C | 3.6°C | 172 mm | 85% | 1.7 m/s | 3.8 |
| 1988 🔥 | 15.6°C | 12.5°C | 9.4°C | 18.4°C | 3.8°C | 101 mm | 86% | 1.8 m/s | 3.8 |
| 1987 | 14.7°C | 11.5°C | 8.4°C | 18.1°C | 5.7°C | 50 mm | 82% | 2 m/s | 4.1 |
| 1986 | 14.6°C | 11.4°C | 8.2°C | 18.8°C | 4.8°C | 111 mm | 83% | 1.7 m/s | 4.1 |
| 1985 | 14.4°C | 11.4°C | 8.4°C | 17.6°C | 4.8°C | 94 mm | 82% | 2 m/s | 4.2 |
| 1984 | 14.4°C | 11.3°C | 8.3°C | 16.6°C | 5.0°C | 108 mm | 84% | 1.6 m/s | 4 |
| 1983 | 15.5°C | 11.9°C | 8.4°C | 17.8°C | 4.4°C | 72 mm | 81% | 1.9 m/s | — |
| 1982 | 14.9°C | 11.3°C | 7.8°C | 18.6°C | 3.7°C | 62 mm | 80% | 1.5 m/s | — |
| 1981 | 14.6°C | 11.2°C | 7.8°C | 17.0°C | 4.7°C | 55 mm | 81% | 2.1 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 14.8°C with lows near 8.3°C (mean 11.6°C), based on 45 years of NASA POWER data.
September averages 93 mm of rainfall in Whakatane, about average for rainfall. The wettest on record was 230 mm in 2022.
The hottest September reached 21°C in 1999. The coldest dipped to 2.3°C in 1992.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 0.6°C. Daytime highs moved from 14.8°C to 15.1°C and overnight lows from 8.1°C to 8.8°C over the same span.
September is one of the cooler months of the year in Whakatane and about average for rainfall, so plan for around 14.8°C daytime highs and 8.3°C at night.
Not quite — September is the 4th coolest month in Whakatane, averaging 11.6°C.
For September in Whakatane, pack light layers you can adjust through the day, with typical highs of 14.8°C and lows of 8.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 83% — quite humid.
Average wind speed in September is 1.7 m/s. The windiest September on record averaged 2.1 m/s (1981).
The wettest September on record was 2022 with 230 mm. On average, September sees 93 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 Whakatane behaves each September, 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 September specifically, along with year-by-year records and how the month has changed over the decades.
