September is one of the cooler months of the year in Inverell, with average highs near 19.4°C and lows around 5.8°C (mean 12.6°C). It is one of the drier months, averaging 47 mm of rainfall and 64% relative humidity across the period.
September is one of the cooler months of the year in Inverell. Across 45 years of records, the warmest September in Inverell was 2023 — when the month averaged 16°C — while the coldest was 1984 at 9.1°C. Typical September days reach 19.4°C with nights near 5.8°C. The long-term trend is warming, about 0.6°C per decade.
September is one of the drier months in Inverell, averaging 47 mm of rainfall. The wettest September on record was 2016 with 121 mm, while the driest was 2019 at 1 mm.
Relative humidity in Inverell during September averages 64%. The most humid September was 1998 at 83%, and the least humid was 2019 at 40%.
September receives about 5.5 kWh/m²/day of solar energy in Inverell. The sunniest September was 2003 at 6.2 kWh/m²/day, and the cloudiest was 2010 at 4.4.
Average wind speed in Inverell during September is 2 m/s. The windiest September was 1996 at 2.4 m/s, while the calmest was 1987 at 1.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 11.6°C | 11.7°C | 13.5°C | 13.0°C | 13.5°C | +1.9°C |
| Avg High | 18.2°C | 18.3°C | 20.4°C | 19.9°C | 20.3°C | +2.1°C |
| Avg Low | 5.0°C | 5.1°C | 6.5°C | 6.1°C | 6.7°C | +1.7°C |
| Avg Rain | 46 mm | 59 mm | 41 mm | 48 mm | 38 mm | -8 mm |
September temperatures in Inverell have risen by about 2°C between 1981–1985 and 2021–2025.
September has ranged from a record low of -3.6°C (1987) to a record high of 30.9°C (2000).
Rainfall in September is one of the drier months, averaging 47 mm, with a wettest year of 121 mm.
A good time to visit Inverell
September is a good time to visit Inverell, with days averaging 19.4°C and nights around 5.8°C (mean 12.6°C, cooler than Inverell's yearly average) and moderate rainfall. February and January are marginally more temperate, but September still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 20.1°C | 13.4°C | 6.7°C | 27.0°C | 3.1°C | 30 mm | 64% | 1.8 m/s | 5.5 |
| 2024 | 21.9°C | 14.5°C | 7.2°C | 26.7°C | 2.4°C | 21 mm | 53% | 2.1 m/s | 5.6 |
| 2023 🔥 | 24.1°C | 16.0°C | 7.9°C | 29.4°C | 1.5°C | 9 mm | 48% | 1.8 m/s | 5.8 |
| 2022 | 17.7°C | 12.1°C | 6.5°C | 21.7°C | 2.1°C | 80 mm | 73% | 2.2 m/s | 4.8 |
| 2021 | 17.8°C | 11.5°C | 5.2°C | 21.4°C | -0.8°C | 53 mm | 71% | 2.1 m/s | 5.4 |
| 2020 | 20.5°C | 13.6°C | 6.7°C | 24.1°C | 0.2°C | 33 mm | 65% | 2.1 m/s | 5.5 |
| 2019 | 22.7°C | 14.8°C | 6.9°C | 27.5°C | -0.2°C | 1 mm | 40% | 2.3 m/s | 5.9 |
| 2018 | 19.1°C | 12.6°C | 6.1°C | 24.3°C | 1.4°C | 63 mm | 67% | 2 m/s | 5.5 |
| 2017 | 21.8°C | 14.0°C | 6.3°C | 30.3°C | -0.3°C | 6 mm | 48% | 2.2 m/s | 6.1 |
| 2016 🌧️ | 16.6°C | 11.0°C | 5.4°C | 19.4°C | 1.6°C | 121 mm | 81% | 2.3 m/s | 4.5 |
| 2015 | 19.0°C | 12.2°C | 5.4°C | 23.6°C | 0.5°C | 23 mm | 66% | 1.9 m/s | 5.6 |
| 2014 | 19.2°C | 12.4°C | 5.6°C | 26.6°C | 0.2°C | 27 mm | 65% | 2 m/s | 5.6 |
| 2013 | 23.4°C | 15.5°C | 7.7°C | 30.2°C | 1.9°C | 35 mm | 53% | 2 m/s | 6.1 |
| 2012 | 20.3°C | 12.9°C | 5.4°C | 26.0°C | -1.2°C | 25 mm | 58% | 2 m/s | 5.7 |
| 2011 | 19.3°C | 12.4°C | 5.5°C | 24.7°C | -0.9°C | 72 mm | 64% | 2.1 m/s | 5.5 |
| 2010 | 17.2°C | 11.8°C | 6.5°C | 21.5°C | 0.2°C | 103 mm | 80% | 1.8 m/s | 4.4 |
| 2009 | 20.4°C | 13.6°C | 6.7°C | 25.4°C | -0.4°C | 65 mm | 59% | 2.2 m/s | 5.7 |
| 2008 | 20.0°C | 13.6°C | 7.2°C | 26.4°C | 1.4°C | 45 mm | 67% | 2.1 m/s | 5.4 |
| 2007 | 19.7°C | 12.8°C | 5.9°C | 26.7°C | 1.7°C | 6 mm | 59% | 2.1 m/s | 5.8 |
| 2006 | 21.2°C | 14.0°C | 6.9°C | 27.6°C | 2.6°C | 42 mm | 64% | 2.1 m/s | 5.6 |
| 2005 | 18.9°C | 12.6°C | 6.4°C | 24.4°C | -0.2°C | 93 mm | 69% | 2 m/s | 5.1 |
| 2004 | 18.8°C | 12.2°C | 5.7°C | 27.9°C | -2.8°C | 72 mm | 65% | 1.8 m/s | 5.6 |
| 2003 | 21.5°C | 13.8°C | 6.1°C | 29.9°C | 0.4°C | 5 mm | 50% | 2.2 m/s | 6.2 |
| 2002 | 21.6°C | 13.9°C | 6.3°C | 28.2°C | 0.5°C | 40 mm | 55% | 2.2 m/s | 5.6 |
| 2001 | 19.9°C | 12.9°C | 5.9°C | 27.3°C | 1.9°C | 30 mm | 68% | 1.9 m/s | 5.2 |
| 2000 | 22.4°C | 15.2°C | 8.0°C | 30.9°C | 0.9°C | 14 mm | 54% | 2.2 m/s | 5.6 |
| 1999 | 19.6°C | 13.1°C | 6.5°C | 24.5°C | -0.6°C | 47 mm | 67% | 1.8 m/s | 5.6 |
| 1998 | 18.1°C | 12.7°C | 7.3°C | 24.7°C | 1.2°C | 117 mm | 83% | 1.9 m/s | 4.9 |
| 1997 | 19.2°C | 12.8°C | 6.4°C | 23.1°C | 2.3°C | 83 mm | 65% | 2 m/s | 5.2 |
| 1996 | 17.9°C | 11.6°C | 5.3°C | 27.1°C | 0.3°C | 77 mm | 68% | 2.4 m/s | 5.4 |
| 1995 | 18.4°C | 11.8°C | 5.1°C | 23.3°C | -3.5°C | 102 mm | 67% | 1.9 m/s | 5.2 |
| 1994 | 18.9°C | 11.1°C | 3.3°C | 23.3°C | -2.0°C | 19 mm | 51% | 2.1 m/s | 5.9 |
| 1993 | 17.8°C | 11.0°C | 4.3°C | 23.7°C | 0.7°C | 58 mm | 70% | 2 m/s | 5.3 |
| 1992 | 17.0°C | 10.3°C | 3.6°C | 23.8°C | -1.8°C | 39 mm | 63% | 2.2 m/s | 5.4 |
| 1991 | 19.2°C | 11.9°C | 4.6°C | 23.8°C | -2.7°C | 14 mm | 53% | 2.3 m/s | 5.8 |
| 1990 | 16.7°C | 10.5°C | 4.4°C | 22.8°C | 0.3°C | 31 mm | 77% | 1.8 m/s | 5.4 |
| 1989 | 18.3°C | 10.8°C | 3.2°C | 25.3°C | -1.6°C | 8 mm | 65% | 2 m/s | 6 |
| 1988 | 18.0°C | 12.4°C | 6.8°C | 26.8°C | 2.5°C | 73 mm | 76% | 2.3 m/s | 4.9 |
| 1987 | 18.5°C | 11.4°C | 4.4°C | 25.8°C | -3.6°C | 18 mm | 64% | 1.7 m/s | 5.8 |
| 1986 | 18.7°C | 12.1°C | 5.4°C | 25.8°C | -1.5°C | 60 mm | 69% | 2.1 m/s | 5.3 |
| 1985 | 16.5°C | 10.4°C | 4.3°C | 21.5°C | -0.7°C | 51 mm | 71% | 1.9 m/s | 5.4 |
| 1984 ❄️ | 15.2°C | 9.1°C | 3.1°C | 19.0°C | -2.8°C | 46 mm | 71% | 2.2 m/s | 5.6 |
| 1983 | 18.6°C | 12.6°C | 6.7°C | 22.9°C | 2.0°C | 74 mm | 78% | 2.1 m/s | — |
| 1982 | 19.2°C | 12.0°C | 4.7°C | 24.8°C | -0.6°C | 37 mm | 55% | 2.2 m/s | — |
| 1981 | 20.5°C | 13.3°C | 6.2°C | 26.8°C | 0.1°C | 48 mm | 62% | 1.8 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 19.4°C with lows near 5.8°C (mean 12.6°C), based on 45 years of NASA POWER data.
September averages 47 mm of rainfall in Inverell, one of the drier months. The wettest on record was 121 mm in 2016.
The hottest September reached 30.9°C in 2000. The coldest dipped to -3.6°C in 1987.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 2°C. Daytime highs moved from 18°C to 20.3°C and overnight lows from 5°C to 6.7°C over the same span.
September is one of the cooler months of the year in Inverell and one of the drier months, so plan for around 19.4°C daytime highs and 5.8°C at night.
Not quite — September is the 5th coolest month in Inverell, averaging 12.6°C.
For September in Inverell, pack warm layers and a jacket for chilly mornings, with typical highs of 19.4°C and lows of 5.8°C.
Relative humidity in September averages 64% — moderately humid.
Average wind speed in September is 2 m/s. The windiest September on record averaged 2.4 m/s (1996).
The wettest September on record was 2016 with 121 mm. On average, September sees 47 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 Inverell 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.
