September is one of the cooler months of the year in Gympie, with average highs near 25.8°C and lows around 12.9°C (mean 19.4°C). It is one of the drier months, averaging 37 mm of rainfall and 64% relative humidity across the period.
September is one of the cooler months of the year in Gympie. Across 45 years of records, the warmest September in Gympie was 2017 — when the month averaged 22.2°C — while the coldest was 1989 at 17°C. Typical September days reach 25.8°C with nights near 12.9°C. The long-term trend is warming, about 0.5°C per decade.
September is one of the drier months in Gympie, averaging 37 mm of rainfall. The wettest September on record was 1998 with 146 mm, while the driest was 2000 at 1 mm.
Relative humidity in Gympie during September averages 64%. The most humid September was 1983 at 80%, and the least humid was 1991 at 44%.
September receives about 5.5 kWh/m²/day of solar energy in Gympie. The sunniest Septembers were 2003, 2009 and 2017 at 6.2 kWh/m²/day, and the cloudiest was 2010 at 4.3.
Average wind speed in Gympie during September is 0.3 m/s. The windiest Septembers were 1991, 1994 and 1996 at 0.4 m/s, while the calmest were 2023, 2024 and 2025, among others at 0.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 18.4°C | 18.9°C | 19.7°C | 19.9°C | 20.1°C | +1.7°C |
| Avg High | 24.7°C | 25.2°C | 26.3°C | 26.4°C | 26.6°C | +1.9°C |
| Avg Low | 12.0°C | 12.5°C | 13.0°C | 13.4°C | 13.7°C | +1.7°C |
| Avg Rain | 31 mm | 53 mm | 35 mm | 35 mm | 27 mm | -5 mm |
September temperatures in Gympie have risen by about 1.6°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 4.5°C (1987) to a record high of 38.3°C (2017).
Rainfall in September is one of the drier months, averaging 37 mm, with a wettest year of 146 mm.
One of the best times to visit Gympie
September is one of the best times to visit Gympie. Expect days averaging 25.8°C and nights around 12.9°C (mean 19.4°C) — cooler than Gympie's yearly average — with moderate rainfall (37 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 | 27.0°C | 20.4°C | 13.7°C | 33.6°C | 9.2°C | 19 mm | 67% | 0.3 m/s | 5.6 |
| 2024 | 27.9°C | 21.1°C | 14.2°C | 32.4°C | 9.8°C | 19 mm | 63% | 0.3 m/s | 5.6 |
| 2023 | 27.2°C | 20.7°C | 14.2°C | 34.1°C | 10.5°C | 17 mm | 63% | 0.3 m/s | 5.5 |
| 2022 | 24.9°C | 19.1°C | 13.3°C | 29.7°C | 10.3°C | 60 mm | 68% | 0.3 m/s | 4.6 |
| 2021 | 26.3°C | 19.4°C | 12.6°C | 31.0°C | 8.2°C | 14 mm | 59% | 0.3 m/s | 5.6 |
| 2020 | 26.1°C | 20.1°C | 14.2°C | 30.9°C | 9.1°C | 30 mm | 66% | 0.3 m/s | 5.2 |
| 2019 | 28.5°C | 21.0°C | 13.5°C | 33.1°C | 9.2°C | 2 mm | 50% | 0.3 m/s | 6.1 |
| 2018 | 26.0°C | 19.6°C | 13.2°C | 30.9°C | 10.0°C | 37 mm | 64% | 0.3 m/s | 5.4 |
| 2017 🔥 | 29.9°C | 22.2°C | 14.5°C | 38.3°C | 9.5°C | 2 mm | 51% | 0.3 m/s | 6.2 |
| 2016 | 26.2°C | 20.1°C | 14.1°C | 29.5°C | 9.3°C | 46 mm | 65% | 0.3 m/s | 4.9 |
| 2015 | 24.4°C | 18.3°C | 12.2°C | 28.4°C | 7.2°C | 44 mm | 67% | 0.3 m/s | 5.5 |
| 2014 | 24.9°C | 18.8°C | 12.6°C | 29.1°C | 6.8°C | 22 mm | 65% | 0.3 m/s | 5.5 |
| 2013 | 29.0°C | 22.1°C | 15.2°C | 36.9°C | 10.8°C | 20 mm | 59% | 0.3 m/s | 5.8 |
| 2012 | 26.1°C | 19.3°C | 12.6°C | 32.9°C | 7.4°C | 19 mm | 64% | 0.3 m/s | 5.6 |
| 2011 | 24.7°C | 18.0°C | 11.3°C | 30.3°C | 7.0°C | 20 mm | 64% | 0.3 m/s | 5.6 |
| 2010 | 24.1°C | 19.3°C | 14.4°C | 28.3°C | 10.8°C | 137 mm | 78% | 0.3 m/s | 4.3 |
| 2009 | 27.1°C | 19.9°C | 12.7°C | 32.6°C | 8.0°C | 71 mm | 61% | 0.3 m/s | 6.2 |
| 2008 | 25.3°C | 19.5°C | 13.7°C | 34.5°C | 8.9°C | 41 mm | 72% | 0.3 m/s | 5.3 |
| 2007 | 23.3°C | 17.9°C | 12.5°C | 29.4°C | 7.6°C | 82 mm | 79% | 0.3 m/s | 5.5 |
| 2006 | 24.7°C | 19.0°C | 13.3°C | 30.4°C | 8.5°C | 56 mm | 71% | 0.3 m/s | 5.3 |
| 2005 | 26.5°C | 19.7°C | 12.9°C | 32.2°C | 7.0°C | 22 mm | 63% | 0.3 m/s | 5.7 |
| 2004 | 26.2°C | 19.2°C | 12.2°C | 32.1°C | 8.7°C | 22 mm | 64% | 0.3 m/s | 5.7 |
| 2003 | 28.7°C | 20.9°C | 13.2°C | 34.7°C | 7.4°C | 7 mm | 54% | 0.3 m/s | 6.2 |
| 2002 | 26.8°C | 20.0°C | 13.2°C | 32.6°C | 8.5°C | 9 mm | 62% | 0.3 m/s | 5.7 |
| 2001 | 25.7°C | 19.3°C | 12.9°C | 29.4°C | 8.8°C | 36 mm | 64% | 0.3 m/s | 5 |
| 2000 | 28.7°C | 21.1°C | 13.4°C | 34.8°C | 9.6°C | 1 mm | 55% | 0.3 m/s | 6 |
| 1999 | 22.9°C | 17.9°C | 12.9°C | 26.6°C | 8.2°C | 52 mm | 78% | 0.3 m/s | 5.3 |
| 1998 🌧️ | 23.6°C | 19.3°C | 14.9°C | 28.2°C | 8.2°C | 146 mm | 79% | 0.3 m/s | 4.8 |
| 1997 | 26.6°C | 20.2°C | 13.8°C | 33.8°C | 9.1°C | 46 mm | 64% | 0.3 m/s | 4.9 |
| 1996 | 27.5°C | 19.4°C | 11.4°C | 33.4°C | 5.2°C | 58 mm | 53% | 0.4 m/s | 5.8 |
| 1995 | 26.3°C | 19.6°C | 12.8°C | 29.2°C | 5.3°C | 29 mm | 62% | 0.3 m/s | 5.4 |
| 1994 | 26.1°C | 18.7°C | 11.2°C | 32.5°C | 6.3°C | 17 mm | 53% | 0.4 m/s | 6 |
| 1993 | 23.5°C | 18.0°C | 12.5°C | 33.0°C | 8.1°C | 74 mm | 70% | 0.3 m/s | 4.9 |
| 1992 | 24.1°C | 17.6°C | 11.2°C | 29.8°C | 6.1°C | 92 mm | 67% | 0.3 m/s | 5.4 |
| 1991 | 28.3°C | 20.6°C | 12.9°C | 33.0°C | 7.6°C | 4 mm | 44% | 0.4 m/s | 6.1 |
| 1990 | 23.5°C | 17.4°C | 11.2°C | 28.7°C | 6.3°C | 9 mm | 63% | 0.3 m/s | 5.5 |
| 1989 ❄️ | 23.5°C | 17.0°C | 10.5°C | 28.9°C | 6.2°C | 14 mm | 69% | 0.3 m/s | 6 |
| 1988 | 23.9°C | 18.4°C | 12.8°C | 34.4°C | 7.9°C | 31 mm | 74% | 0.3 m/s | 5.1 |
| 1987 | 25.4°C | 18.4°C | 11.5°C | 30.1°C | 4.5°C | 9 mm | 61% | 0.3 m/s | 5.5 |
| 1986 | 25.7°C | 19.1°C | 12.5°C | 32.4°C | 6.7°C | 39 mm | 64% | 0.3 m/s | 5.5 |
| 1985 | 24.5°C | 18.1°C | 11.7°C | 31.2°C | 5.7°C | 60 mm | 63% | 0.3 m/s | 5.5 |
| 1984 | 24.4°C | 17.5°C | 10.6°C | 27.2°C | 5.8°C | 41 mm | 59% | 0.3 m/s | 5.8 |
| 1983 | 24.1°C | 18.7°C | 13.4°C | 28.3°C | 8.8°C | 28 mm | 80% | 0.3 m/s | — |
| 1982 | 24.7°C | 18.3°C | 11.9°C | 32.5°C | 8.0°C | 46 mm | 64% | 0.3 m/s | — |
| 1981 | 26.5°C | 19.9°C | 13.3°C | 34.7°C | 6.6°C | 13 mm | 63% | 0.3 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 25.8°C with lows near 12.9°C (mean 19.4°C), based on 45 years of NASA POWER data.
September averages 37 mm of rainfall in Gympie, one of the drier months. The wettest on record was 146 mm in 1998.
The hottest September reached 38.3°C in 2017. The coldest dipped to 4.5°C in 1987.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.6°C. Daytime highs moved from 24.8°C to 26.7°C and overnight lows from 12.2°C to 13.6°C over the same span.
September is one of the cooler months of the year in Gympie and one of the drier months, so plan for around 25.8°C daytime highs and 12.9°C at night.
Not quite — September is the 5th coolest month in Gympie, averaging 19.4°C.
For September in Gympie, pack light layers you can adjust through the day, with typical highs of 25.8°C and lows of 12.9°C.
Relative humidity in September averages 64% — moderately humid.
Average wind speed in September is 0.3 m/s. The windiest September on record averaged 0.4 m/s (1991).
The wettest September on record was 1998 with 146 mm. On average, September sees 37 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 Gympie 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.
