September is one of the cooler months of the year in Dalby, with average highs near 26°C and lows around 10°C (mean 18°C). It is one of the drier months, averaging 26 mm of rainfall and 56% relative humidity across the period.
September is one of the cooler months of the year in Dalby. Across 45 years of records, the warmest September in Dalby was 2013 — when the month averaged 21°C — while the coldest was 1984 at 14.6°C. Typical September days reach 26°C with nights near 10°C. The long-term trend is warming, about 0.6°C per decade.
September is one of the drier months in Dalby, averaging 26 mm of rainfall. The wettest September on record was 2010 with 110 mm, while the driest was 2017 at 0 mm.
Relative humidity in Dalby during September averages 56%. The most humid September was 1998 at 79%, and the least humid was 1991 at 38%.
September receives about 5.7 kWh/m²/day of solar energy in Dalby. The sunniest Septembers were 2003 and 2017 at 6.3 kWh/m²/day, and the cloudiest was 2010 at 4.4.
Average wind speed in Dalby during September is 2.8 m/s. The windiest Septembers were 1988, 1996 and 2016 at 3.1 m/s, while the calmest were 1981, 2004 and 2025 at 2.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 17.0°C | 17.3°C | 18.6°C | 18.4°C | 19.2°C | +2.2°C |
| Avg High | 25.0°C | 25.2°C | 26.8°C | 26.3°C | 27.1°C | +2.1°C |
| Avg Low | 9.1°C | 9.4°C | 10.4°C | 10.4°C | 11.2°C | +2.1°C |
| Avg Rain | 21 mm | 38 mm | 22 mm | 28 mm | 19 mm | -2 mm |
September temperatures in Dalby have risen by about 2.3°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 0.2°C (1995) to a record high of 38.6°C (2013).
Rainfall in September is one of the drier months, averaging 26 mm, with a wettest year of 110 mm.
A good time to visit Dalby
September is a good time to visit Dalby, with days averaging 26°C and nights around 10°C (mean 18°C, cooler than Dalby's yearly average) and low rainfall. October and April 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 | 27.2°C | 19.3°C | 11.4°C | 34.4°C | 5.3°C | 10 mm | 56% | 2.4 m/s | 5.7 |
| 2024 | 28.4°C | 20.1°C | 11.8°C | 34.0°C | 5.7°C | 25 mm | 51% | 2.5 m/s | 5.7 |
| 2023 | 28.8°C | 20.2°C | 11.6°C | 34.7°C | 6.1°C | 7 mm | 50% | 2.7 m/s | 6 |
| 2022 | 24.2°C | 17.4°C | 10.6°C | 29.0°C | 6.5°C | 57 mm | 66% | 2.7 m/s | 4.9 |
| 2021 | 26.6°C | 18.3°C | 10.0°C | 32.1°C | 3.8°C | 11 mm | 50% | 3 m/s | 5.6 |
| 2020 | 27.4°C | 19.6°C | 11.7°C | 33.1°C | 4.9°C | 4 mm | 54% | 3 m/s | 5.6 |
| 2019 | 28.3°C | 19.6°C | 10.8°C | 32.7°C | 4.6°C | 5 mm | 39% | 2.7 m/s | 6.2 |
| 2018 | 26.8°C | 18.8°C | 10.8°C | 31.1°C | 6.6°C | 14 mm | 54% | 3 m/s | 5.7 |
| 2017 | 29.4°C | 20.4°C | 11.3°C | 38.0°C | 4.6°C | 0 mm | 39% | 3 m/s | 6.3 |
| 2016 | 24.8°C | 17.7°C | 10.6°C | 27.9°C | 6.1°C | 54 mm | 65% | 3.1 m/s | 4.9 |
| 2015 | 24.9°C | 17.0°C | 9.1°C | 29.2°C | 3.8°C | 18 mm | 60% | 2.6 m/s | 5.8 |
| 2014 | 24.8°C | 17.1°C | 9.5°C | 30.8°C | 3.0°C | 25 mm | 58% | 2.8 m/s | 5.7 |
| 2013 🔥 | 29.9°C | 21.0°C | 12.0°C | 38.6°C | 7.6°C | 16 mm | 48% | 2.7 m/s | 6.1 |
| 2012 | 26.3°C | 18.1°C | 9.8°C | 32.1°C | 2.3°C | 13 mm | 55% | 2.5 m/s | 5.8 |
| 2011 | 24.9°C | 16.8°C | 8.7°C | 30.1°C | 2.0°C | 24 mm | 59% | 2.5 m/s | 5.8 |
| 2010 🌧️ | 22.5°C | 17.0°C | 11.5°C | 27.1°C | 6.3°C | 110 mm | 76% | 2.5 m/s | 4.4 |
| 2009 | 26.9°C | 18.5°C | 10.0°C | 33.5°C | 4.9°C | 52 mm | 56% | 2.7 m/s | 6 |
| 2008 | 25.4°C | 18.3°C | 11.1°C | 33.1°C | 5.6°C | 55 mm | 67% | 2.8 m/s | 5.5 |
| 2007 | 25.3°C | 17.6°C | 9.9°C | 31.6°C | 5.2°C | 25 mm | 62% | 2.7 m/s | 5.7 |
| 2006 | 26.3°C | 18.6°C | 10.9°C | 32.2°C | 5.3°C | 22 mm | 61% | 2.9 m/s | 5.6 |
| 2005 | 27.0°C | 18.9°C | 10.9°C | 33.6°C | 3.7°C | 15 mm | 57% | 2.8 m/s | 5.6 |
| 2004 | 26.0°C | 17.7°C | 9.4°C | 34.0°C | 1.8°C | 18 mm | 56% | 2.4 m/s | 5.8 |
| 2003 | 28.6°C | 19.6°C | 10.7°C | 35.4°C | 3.0°C | 2 mm | 45% | 2.8 m/s | 6.3 |
| 2002 | 26.9°C | 18.5°C | 10.1°C | 34.2°C | 4.8°C | 5 mm | 54% | 2.9 m/s | 5.8 |
| 2001 | 26.0°C | 17.9°C | 9.9°C | 30.3°C | 5.3°C | 22 mm | 58% | 2.8 m/s | 5.5 |
| 2000 | 29.4°C | 20.4°C | 11.5°C | 35.6°C | 5.2°C | 2 mm | 41% | 2.6 m/s | 5.9 |
| 1999 | 25.6°C | 17.9°C | 10.3°C | 31.1°C | 4.7°C | 14 mm | 63% | 2.9 m/s | 5.6 |
| 1998 | 23.0°C | 17.2°C | 11.4°C | 29.2°C | 4.3°C | 95 mm | 79% | 2.7 m/s | 4.9 |
| 1997 | 26.4°C | 18.8°C | 11.1°C | 32.0°C | 7.0°C | 60 mm | 57% | 2.6 m/s | 5.3 |
| 1996 | 25.9°C | 17.2°C | 8.5°C | 31.7°C | 2.1°C | 63 mm | 54% | 3.1 m/s | 5.8 |
| 1995 | 26.0°C | 17.9°C | 9.8°C | 30.0°C | 0.2°C | 34 mm | 55% | 2.7 m/s | 5.5 |
| 1994 | 25.8°C | 17.0°C | 8.1°C | 30.6°C | 2.1°C | 7 mm | 41% | 2.8 m/s | 6 |
| 1993 | 24.2°C | 16.7°C | 9.1°C | 31.5°C | 4.5°C | 47 mm | 63% | 3 m/s | 5.1 |
| 1992 | 24.2°C | 16.2°C | 8.2°C | 30.8°C | 3.4°C | 45 mm | 57% | 2.8 m/s | 5.6 |
| 1991 | 26.9°C | 18.3°C | 9.6°C | 32.0°C | 2.4°C | 2 mm | 38% | 2.9 m/s | 6.1 |
| 1990 | 23.7°C | 16.0°C | 8.3°C | 29.9°C | 2.3°C | 15 mm | 62% | 2.9 m/s | 5.7 |
| 1989 | 25.3°C | 16.5°C | 7.8°C | 31.7°C | 3.2°C | 11 mm | 56% | 2.7 m/s | 6.2 |
| 1988 | 24.8°C | 17.4°C | 10.0°C | 35.7°C | 4.2°C | 37 mm | 67% | 3.1 m/s | 5.3 |
| 1987 | 26.0°C | 17.3°C | 8.7°C | 30.1°C | 0.4°C | 6 mm | 54% | 2.5 m/s | 5.7 |
| 1986 | 26.2°C | 18.0°C | 9.8°C | 32.7°C | 1.7°C | 15 mm | 54% | 3 m/s | 5.8 |
| 1985 | 23.8°C | 16.0°C | 8.2°C | 31.1°C | 1.8°C | 24 mm | 59% | 2.8 m/s | 5.7 |
| 1984 ❄️ | 22.0°C | 14.6°C | 7.1°C | 25.9°C | 1.2°C | 37 mm | 63% | 2.7 m/s | 6.1 |
| 1983 | 25.6°C | 18.4°C | 11.2°C | 30.9°C | 5.0°C | 18 mm | 70% | 2.7 m/s | — |
| 1982 | 24.6°C | 17.0°C | 9.3°C | 32.7°C | 3.9°C | 37 mm | 55% | 2.8 m/s | — |
| 1981 | 26.3°C | 18.1°C | 9.8°C | 33.0°C | 1.1°C | 5 mm | 58% | 2.4 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 26°C with lows near 10°C (mean 18°C), based on 45 years of NASA POWER data.
September averages 26 mm of rainfall in Dalby, one of the drier months. The wettest on record was 110 mm in 2010.
The hottest September reached 38.6°C in 2013. The coldest dipped to 0.2°C in 1995.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 2.3°C. Daytime highs moved from 24.5°C to 27°C and overnight lows from 9.1°C to 11.1°C over the same span.
September is one of the cooler months of the year in Dalby and one of the drier months, so plan for around 26°C daytime highs and 10°C at night.
Not quite — September is the 5th coolest month in Dalby, averaging 18°C.
For September in Dalby, pack light layers you can adjust through the day, with typical highs of 26°C and lows of 10°C.
Relative humidity in September averages 56% — moderately humid.
Average wind speed in September is 2.8 m/s. The windiest September on record averaged 3.1 m/s (1988).
The wettest September on record was 2010 with 110 mm. On average, September sees 26 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 Dalby 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.
