September is one of the cooler months of the year in Townsville, with average highs near 24.9°C and lows around 21.7°C (mean 23.3°C). It is one of the drier months, averaging 12 mm of rainfall and 72% relative humidity across the period.
September is one of the cooler months of the year in Townsville. Across 45 years of records, the warmest September in Townsville was 2010 — when the month averaged 24.9°C — while the coldest was 1990 at 21.8°C. Typical September days reach 24.9°C with nights near 21.7°C. The long-term September temperature trend is broadly flat.
September is one of the drier months in Townsville, averaging 12 mm of rainfall. The wettest September on record was 2010 with 77 mm, while the driest was 1991 at 0 mm.
Relative humidity in Townsville during September averages 72%. The most humid September was 2010 at 81%, and the least humid was 1991 at 64%.
September receives about 6.3 kWh/m²/day of solar energy in Townsville. The sunniest September was 2019 at 6.9 kWh/m²/day, and the cloudiest was 2010 at 5.
Average wind speed in Townsville during September is 4.4 m/s. The windiest September was 1981 at 5.6 m/s, while the calmest were 1984 and 2007 at 3.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.2°C | 23.1°C | 23.3°C | 23.4°C | 23.7°C | +0.5°C |
| Avg High | 24.9°C | 24.7°C | 25.0°C | 25.0°C | 25.2°C | +0.3°C |
| Avg Low | 21.5°C | 21.6°C | 21.7°C | 22.0°C | 22.2°C | +0.7°C |
| Avg Rain | 10 mm | 14 mm | 14 mm | 11 mm | 7 mm | -2 mm |
September temperatures in Townsville have risen by about 0.6°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 16°C (1985) to a record high of 31.3°C (2003).
Rainfall in September is one of the drier months, averaging 12 mm, with a wettest year of 77 mm.
One of the best times to visit Townsville
September is one of the best times to visit Townsville. Expect days averaging 24.9°C and nights around 21.7°C (mean 23.3°C) — cooler than Townsville's yearly average — with low rainfall (12 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 25.5°C | 24.0°C | 22.5°C | 27.9°C | 20.5°C | 17 mm | 74% | 4.7 m/s | 5.9 |
| 2024 | 25.5°C | 24.0°C | 22.5°C | 28.7°C | 20.8°C | 3 mm | 73% | 4.8 m/s | 5.6 |
| 2023 | 25.1°C | 23.6°C | 22.1°C | 26.7°C | 20.6°C | 6 mm | 73% | 5.3 m/s | 6.4 |
| 2022 | 25.5°C | 24.1°C | 22.6°C | 27.7°C | 17.9°C | 9 mm | 77% | 3.9 m/s | 5.9 |
| 2021 | 24.5°C | 23.0°C | 21.5°C | 28.2°C | 17.9°C | 3 mm | 72% | 5 m/s | 6 |
| 2020 | 24.8°C | 23.4°C | 21.9°C | 27.3°C | 20.1°C | 5 mm | 76% | 5.2 m/s | 6 |
| 2019 | 24.6°C | 22.7°C | 20.9°C | 26.8°C | 18.1°C | 1 mm | 67% | 4.1 m/s | 6.9 |
| 2018 | 25.1°C | 23.5°C | 22.0°C | 27.7°C | 20.7°C | 2 mm | 70% | 4.4 m/s | 6.6 |
| 2017 | 25.2°C | 23.7°C | 22.2°C | 27.6°C | 21.2°C | 4 mm | 71% | 3.9 m/s | 6.6 |
| 2016 | 25.8°C | 24.5°C | 23.1°C | 29.8°C | 21.1°C | 9 mm | 78% | 4.1 m/s | 5.5 |
| 2015 | 25.0°C | 23.5°C | 22.0°C | 27.7°C | 20.5°C | 4 mm | 69% | 4.3 m/s | 6.3 |
| 2014 | 24.3°C | 22.9°C | 21.5°C | 26.5°C | 18.6°C | 7 mm | 72% | 3.7 m/s | 6.4 |
| 2013 | 25.2°C | 23.7°C | 22.2°C | 27.5°C | 20.5°C | 3 mm | 75% | 4.4 m/s | 6.6 |
| 2012 | 24.4°C | 23.0°C | 21.7°C | 25.8°C | 19.7°C | 4 mm | 74% | 4 m/s | 6.2 |
| 2011 | 23.9°C | 22.1°C | 20.4°C | 27.0°C | 16.6°C | 3 mm | 72% | 4.7 m/s | 6.5 |
| 2010 🔥 🌧️ | 26.1°C | 24.9°C | 23.6°C | 27.2°C | 20.6°C | 77 mm | 81% | 4.2 m/s | 5 |
| 2009 | 25.9°C | 24.2°C | 22.5°C | 28.7°C | 21.0°C | 3 mm | 68% | 4 m/s | 6.6 |
| 2008 | 24.6°C | 23.2°C | 21.7°C | 26.2°C | 19.5°C | 25 mm | 76% | 4.4 m/s | 6 |
| 2007 | 24.5°C | 22.8°C | 21.1°C | 26.5°C | 19.1°C | 12 mm | 73% | 3.6 m/s | 6.3 |
| 2006 | 24.1°C | 22.4°C | 20.6°C | 25.9°C | 16.4°C | 61 mm | 72% | 5 m/s | 6.1 |
| 2005 | 24.8°C | 23.2°C | 21.7°C | 27.2°C | 20.2°C | 3 mm | 71% | 4 m/s | 6.4 |
| 2004 | 24.4°C | 22.9°C | 21.4°C | 25.5°C | 18.9°C | 18 mm | 70% | 4.6 m/s | 6.1 |
| 2003 | 25.5°C | 23.7°C | 21.9°C | 31.3°C | 18.4°C | 1 mm | 66% | 3.9 m/s | 6.8 |
| 2002 | 25.1°C | 23.4°C | 21.7°C | 27.1°C | 19.7°C | 3 mm | 71% | 3.8 m/s | 6.7 |
| 2001 | 25.5°C | 23.9°C | 22.4°C | 28.9°C | 20.8°C | 8 mm | 72% | 4.9 m/s | 6.3 |
| 2000 | 25.1°C | 23.4°C | 21.7°C | 28.6°C | 20.0°C | 2 mm | 70% | 4.4 m/s | 6.5 |
| 1999 | 24.3°C | 22.7°C | 21.1°C | 27.5°C | 19.9°C | 8 mm | 74% | 4.9 m/s | 6.4 |
| 1998 | 25.0°C | 23.9°C | 22.7°C | 27.2°C | 20.0°C | 49 mm | 80% | 4.6 m/s | 5.6 |
| 1997 | 24.8°C | 23.3°C | 21.8°C | 27.4°C | 20.1°C | 11 mm | 76% | 4.1 m/s | 6.5 |
| 1996 | 24.9°C | 23.0°C | 21.0°C | 28.9°C | 17.9°C | 7 mm | 66% | 4.3 m/s | 6.7 |
| 1995 | 24.4°C | 22.8°C | 21.3°C | 27.7°C | 17.5°C | 2 mm | 73% | 4.1 m/s | 6.3 |
| 1994 | 24.0°C | 22.4°C | 20.7°C | 27.6°C | 19.1°C | 5 mm | 72% | 4 m/s | 6.5 |
| 1993 | 24.4°C | 23.1°C | 21.9°C | 25.8°C | 20.9°C | 25 mm | 74% | 4.7 m/s | 5.6 |
| 1992 | 26.0°C | 24.5°C | 23.1°C | 28.6°C | 20.9°C | 20 mm | 74% | 3.9 m/s | 6 |
| 1991 | 25.8°C | 23.9°C | 22.1°C | 28.7°C | 19.7°C | 0 mm | 64% | 4 m/s | 6.8 |
| 1990 ❄️ | 23.6°C | 21.8°C | 20.0°C | 25.7°C | 16.3°C | 8 mm | 68% | 5.2 m/s | 6.4 |
| 1989 | 24.9°C | 23.1°C | 21.3°C | 28.9°C | 18.0°C | 1 mm | 71% | 4 m/s | 6.6 |
| 1988 | 25.1°C | 23.2°C | 21.4°C | 27.0°C | 17.6°C | 5 mm | 72% | 4.3 m/s | 6.3 |
| 1987 | 24.5°C | 23.0°C | 21.6°C | 25.3°C | 18.4°C | 9 mm | 71% | 4.8 m/s | 6 |
| 1986 | 25.6°C | 23.9°C | 22.2°C | 30.3°C | 19.9°C | 18 mm | 72% | 4.2 m/s | 6.2 |
| 1985 | 24.8°C | 22.7°C | 20.6°C | 28.8°C | 16.0°C | 4 mm | 67% | 4.2 m/s | 6.6 |
| 1984 | 25.3°C | 23.5°C | 21.7°C | 27.7°C | 17.7°C | 17 mm | 70% | 3.6 m/s | 6.4 |
| 1983 | 25.3°C | 23.9°C | 22.5°C | 26.9°C | 20.2°C | 10 mm | 76% | 4.2 m/s | — |
| 1982 | 23.9°C | 22.2°C | 20.4°C | 30.4°C | 18.2°C | 10 mm | 71% | 4.2 m/s | — |
| 1981 | 24.8°C | 23.2°C | 21.7°C | 28.0°C | 18.2°C | 14 mm | 71% | 5.6 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 24.9°C with lows near 21.7°C (mean 23.3°C), based on 45 years of NASA POWER data.
September averages 12 mm of rainfall in Townsville, one of the drier months. The wettest on record was 77 mm in 2010.
The hottest September reached 31.3°C in 2003. The coldest dipped to 16°C in 1985.
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 24.8°C to 25.2°C and overnight lows from 21.4°C to 22.2°C over the same span.
September is one of the cooler months of the year in Townsville and one of the drier months, so plan for around 24.9°C daytime highs and 21.7°C at night.
Not quite — September is the 4th coolest month in Townsville, averaging 23.3°C.
For September in Townsville, pack light layers you can adjust through the day, with typical highs of 24.9°C and lows of 21.7°C.
Relative humidity in September averages 72% — moderately humid.
Average wind speed in September is 4.4 m/s. The windiest September on record averaged 5.6 m/s (1981).
The wettest September on record was 2010 with 77 mm. On average, September sees 12 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 Townsville 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.
