September is one of the cooler months of the year in Te Anau, with average highs near 7.9°C and lows around 1.5°C (mean 4.7°C). It is about average for rainfall, averaging 165 mm of rainfall and 90% relative humidity across the period.
September is one of the cooler months of the year in Te Anau. Across 45 years of records, the warmest September in Te Anau was 1989 — when the month averaged 7°C — while the coldest was 1994 at 2.5°C. Typical September days reach 7.9°C with nights near 1.5°C. The long-term September temperature trend is broadly flat.
September is about average for rainfall in Te Anau, averaging 165 mm of rainfall. The wettest September on record was 2025 with 372 mm, while the driest was 1989 at 30 mm.
Relative humidity in Te Anau during September averages 90%. The most humid September was 2024 at 93%, and the least humid was 1989 at 84%.
September receives about 3 kWh/m²/day of solar energy in Te Anau. The sunniest Septembers were 1989 and 2016 at 3.5 kWh/m²/day, and the cloudiest were 2002 and 2010 at 2.5.
Average wind speed in Te Anau during September is 2.9 m/s. The windiest September was 2025 at 4 m/s, while the calmest were 1989 and 1992 at 1.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 4.9°C | 4.2°C | 4.9°C | 4.8°C | 4.6°C | -0.3°C |
| Avg High | 8.4°C | 7.4°C | 8.0°C | 8.1°C | 7.6°C | -0.8°C |
| Avg Low | 1.5°C | 0.9°C | 1.7°C | 1.6°C | 1.5°C | 0°C |
| Avg Rain | 125 mm | 123 mm | 161 mm | 173 mm | 287 mm | +162 mm |
September temperatures in Te Anau have stayed relatively stable across the record.
September has ranged from a record low of -4.9°C (2010) to a record high of 15.8°C (1989).
Rainfall in September is about average for rainfall, averaging 165 mm, with a wettest year of 372 mm.
A quieter season to visit Te Anau
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Te Anau. That said, September — with days averaging 7.9°C and nights around 1.5°C (mean 4.7°C) and higher rainfall (165 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 🌧️ | 6.4°C | 3.6°C | 0.8°C | 10.5°C | -2.3°C | 372 mm | 92% | 4 m/s | 2.8 |
| 2024 | 6.8°C | 4.0°C | 1.3°C | 11.1°C | -2.9°C | 372 mm | 93% | 3.5 m/s | 2.6 |
| 2023 | 9.2°C | 5.9°C | 2.5°C | 13.4°C | -1.0°C | 302 mm | 89% | 3.4 m/s | 3.2 |
| 2022 | 8.9°C | 5.4°C | 1.9°C | 15.6°C | -3.0°C | 62 mm | 88% | 2 m/s | 3.3 |
| 2021 | 7.4°C | 4.3°C | 1.2°C | 12.0°C | -2.6°C | 275 mm | 91% | 3.5 m/s | 3 |
| 2020 | 7.0°C | 4.2°C | 1.5°C | 10.5°C | -3.0°C | 339 mm | 92% | 3.5 m/s | 2.8 |
| 2019 | 7.6°C | 4.5°C | 1.4°C | 11.9°C | -3.6°C | 147 mm | 90% | 3 m/s | 3.1 |
| 2018 | 8.7°C | 5.1°C | 1.6°C | 13.5°C | -2.4°C | 183 mm | 90% | 2.6 m/s | 3.1 |
| 2017 | 8.1°C | 5.1°C | 2.1°C | 13.3°C | -2.4°C | 337 mm | 91% | 2.8 m/s | 2.9 |
| 2016 | 10.6°C | 6.7°C | 2.9°C | 14.6°C | -2.1°C | 90 mm | 87% | 2.1 m/s | 3.5 |
| 2015 | 7.6°C | 4.0°C | 0.5°C | 14.1°C | -3.1°C | 149 mm | 89% | 2.4 m/s | 3.3 |
| 2014 | 8.6°C | 5.1°C | 1.6°C | 11.6°C | -2.1°C | 99 mm | 89% | 2.6 m/s | 3.3 |
| 2013 | 8.6°C | 5.2°C | 1.9°C | 14.8°C | -2.5°C | 152 mm | 89% | 2.6 m/s | 3.1 |
| 2012 | 8.1°C | 5.1°C | 2.2°C | 12.9°C | -2.0°C | 186 mm | 90% | 3 m/s | 2.6 |
| 2011 | 6.6°C | 3.8°C | 1.0°C | 11.7°C | -3.1°C | 159 mm | 92% | 2.8 m/s | 2.8 |
| 2010 | 6.3°C | 3.6°C | 0.8°C | 13.0°C | -4.9°C | 228 mm | 92% | 3.6 m/s | 2.5 |
| 2009 | 8.4°C | 5.2°C | 1.9°C | 12.0°C | -3.3°C | 116 mm | 89% | 3 m/s | 2.8 |
| 2008 | 7.9°C | 5.0°C | 2.2°C | 12.7°C | -2.2°C | 187 mm | 91% | 3.6 m/s | 2.6 |
| 2007 | 8.4°C | 5.1°C | 1.7°C | 12.5°C | -2.1°C | 141 mm | 90% | 2.9 m/s | 3.1 |
| 2006 | 8.1°C | 5.2°C | 2.3°C | 11.4°C | -1.5°C | 211 mm | 90% | 3.5 m/s | 2.9 |
| 2005 | 9.0°C | 5.6°C | 2.3°C | 13.3°C | -2.9°C | 131 mm | 90% | 2.5 m/s | 3 |
| 2004 | 6.3°C | 3.8°C | 1.2°C | 10.6°C | -2.6°C | 172 mm | 91% | 3.3 m/s | 2.7 |
| 2003 | 6.7°C | 3.4°C | 0.2°C | 11.6°C | -3.8°C | 217 mm | 91% | 3.1 m/s | 2.7 |
| 2002 | 7.3°C | 4.3°C | 1.3°C | 11.5°C | -2.9°C | 204 mm | 91% | 3.8 m/s | 2.5 |
| 2001 | 10.0°C | 6.4°C | 2.8°C | 13.3°C | -1.4°C | 119 mm | 88% | 2.8 m/s | 2.9 |
| 2000 | 8.3°C | 4.8°C | 1.4°C | 11.5°C | -3.4°C | 110 mm | 88% | 3 m/s | 3 |
| 1999 | 9.1°C | 5.8°C | 2.5°C | 13.0°C | -2.2°C | 97 mm | 90% | 3 m/s | 2.9 |
| 1998 | 7.2°C | 4.5°C | 1.8°C | 11.3°C | -2.8°C | 192 mm | 91% | 3.6 m/s | 2.7 |
| 1997 | 7.2°C | 3.4°C | -0.4°C | 11.7°C | -4.8°C | 59 mm | 88% | 1.9 m/s | 3.3 |
| 1996 | 8.8°C | 5.6°C | 2.4°C | 13.1°C | -2.2°C | 149 mm | 89% | 2.8 m/s | 2.8 |
| 1995 | 7.0°C | 3.9°C | 0.8°C | 13.8°C | -3.4°C | 222 mm | 92% | 3.2 m/s | 2.8 |
| 1994 ❄️ | 5.4°C | 2.5°C | -0.5°C | 10.5°C | -4.4°C | 204 mm | 91% | 2.5 m/s | 3 |
| 1993 | 6.6°C | 3.6°C | 0.6°C | 12.5°C | -2.7°C | 90 mm | 91% | 3.2 m/s | 3.1 |
| 1992 | 7.0°C | 3.2°C | -0.7°C | 12.1°C | -2.8°C | 58 mm | 87% | 1.8 m/s | 3.3 |
| 1991 | 8.0°C | 4.9°C | 1.8°C | 11.0°C | -1.2°C | 98 mm | 90% | 2.3 m/s | 2.7 |
| 1990 | 7.7°C | 4.4°C | 1.1°C | 11.2°C | -2.2°C | 64 mm | 89% | 2.7 m/s | 3.1 |
| 1989 🔥 | 11.2°C | 7.0°C | 2.7°C | 15.8°C | -2.8°C | 30 mm | 84% | 1.8 m/s | 3.5 |
| 1988 | 9.1°C | 5.9°C | 2.8°C | 14.3°C | -2.6°C | 127 mm | 90% | 3 m/s | 2.6 |
| 1987 | 7.2°C | 3.7°C | 0.2°C | 11.7°C | -3.5°C | 136 mm | 91% | 2.8 m/s | 2.8 |
| 1986 | 7.7°C | 4.5°C | 1.2°C | 12.7°C | -3.5°C | 127 mm | 89% | 2.8 m/s | 3.2 |
| 1985 | 9.3°C | 5.6°C | 2.0°C | 14.0°C | -3.3°C | 82 mm | 87% | 2.7 m/s | 3.3 |
| 1984 | 9.3°C | 5.3°C | 1.3°C | 14.1°C | -2.2°C | 143 mm | 87% | 2.1 m/s | 3.3 |
| 1983 | 7.2°C | 4.2°C | 1.3°C | 11.2°C | -2.9°C | 160 mm | 91% | 3.2 m/s | — |
| 1982 | 7.7°C | 4.6°C | 1.5°C | 10.6°C | -3.7°C | 152 mm | 90% | 2.4 m/s | — |
| 1981 | 6.5°C | 3.5°C | 0.6°C | 9.8°C | -3.2°C | 170 mm | 92% | 3.4 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 7.9°C with lows near 1.5°C (mean 4.7°C), based on 45 years of NASA POWER data.
September averages 165 mm of rainfall in Te Anau, about average for rainfall. The wettest on record was 372 mm in 2025.
The hottest September reached 15.8°C in 1989. The coldest dipped to -4.9°C in 2010.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have held steady by about 0°C — but days and nights have moved in opposite directions. Overnight lows rose from 1.3°C to 1.5°C while daytime highs eased from 8°C to 7.7°C, narrowing the gap between day and night.
September is one of the cooler months of the year in Te Anau and about average for rainfall, so plan for around 7.9°C daytime highs and 1.5°C at night.
Not quite — September is the 4th coolest month in Te Anau, averaging 4.7°C.
For September in Te Anau, pack warm layers and a jacket for chilly mornings, with typical highs of 7.9°C and lows of 1.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 90% — quite humid.
Average wind speed in September is 2.9 m/s. The windiest September on record averaged 4 m/s (2025).
The wettest September on record was 2025 with 372 mm. On average, September sees 165 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 Te Anau 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.
