September is one of the cooler months of the year in Birdsville, with average highs near 29.3°C and lows around 12.9°C (mean 21.1°C). It is about average for rainfall, averaging 6 mm of rainfall and 31% relative humidity across the period.
September is one of the cooler months of the year in Birdsville. Across 45 years of records, the warmest September in Birdsville was 2013 — when the month averaged 24.9°C — while the coldest was 1984 at 17.4°C. Typical September days reach 29.3°C with nights near 12.9°C. The long-term trend is warming, about 0.3°C per decade.
September is about average for rainfall in Birdsville, averaging 6 mm of rainfall. The wettest September on record was 2010 with 62 mm, while the driest were 2009, 2018 and 2023, among others at 0 mm.
Relative humidity in Birdsville during September averages 31%. The most humid September was 2010 at 60%, and the least humid was 2013 at 21%.
September receives about 6.3 kWh/m²/day of solar energy in Birdsville. The sunniest September was 1985 at 7 kWh/m²/day, and the cloudiest were 2010 and 2016 at 5.3.
Average wind speed in Birdsville during September is 3.3 m/s. The windiest September was 2024 at 3.8 m/s, while the calmest were 1994, 2000 and 2019 at 3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 20.0°C | 20.9°C | 22.0°C | 20.6°C | 22.1°C | +2.1°C |
| Avg High | 28.2°C | 28.9°C | 30.5°C | 28.8°C | 30.2°C | +2°C |
| Avg Low | 11.9°C | 13.0°C | 13.7°C | 12.3°C | 14.0°C | +2.1°C |
| Avg Rain | 2 mm | 5 mm | 4 mm | 12 mm | 4 mm | +2 mm |
September temperatures in Birdsville have risen by about 1.7°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 4.3°C (1986) to a record high of 42.2°C (2017).
Rainfall in September is about average for rainfall, averaging 6 mm, with a wettest year of 62 mm.
One of the best times to visit Birdsville
September is one of the best times to visit Birdsville. Expect days averaging 29.3°C and nights around 12.9°C (mean 21.1°C) — cooler than Birdsville's yearly average — with low rainfall (6 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 | 30.1°C | 21.9°C | 13.6°C | 37.7°C | 5.4°C | 4 mm | 32% | 3.3 m/s | 6.3 |
| 2024 | 30.1°C | 22.4°C | 14.6°C | 36.5°C | 8.7°C | 12 mm | 28% | 3.8 m/s | 6.1 |
| 2023 | 31.8°C | 23.1°C | 14.3°C | 37.9°C | 7.7°C | 0 mm | 23% | 3.2 m/s | 6.5 |
| 2022 | 27.5°C | 20.2°C | 12.8°C | 35.5°C | 7.7°C | 6 mm | 37% | 3.1 m/s | 5.5 |
| 2021 | 29.9°C | 21.4°C | 13.0°C | 39.2°C | 7.0°C | 1 mm | 25% | 3.7 m/s | 6.3 |
| 2020 | 31.8°C | 23.7°C | 15.7°C | 36.6°C | 8.4°C | 2 mm | 27% | 3.4 m/s | 6.5 |
| 2019 | 29.6°C | 20.8°C | 11.9°C | 36.0°C | 7.4°C | 0 mm | 22% | 3 m/s | 6.6 |
| 2018 | 28.4°C | 19.8°C | 11.2°C | 35.9°C | 6.1°C | 0 mm | 23% | 3.3 m/s | 6.8 |
| 2017 | 30.1°C | 21.4°C | 12.7°C | 42.2°C | 6.7°C | 8 mm | 25% | 3.4 m/s | 6.5 |
| 2016 | 25.0°C | 18.3°C | 11.5°C | 32.5°C | 6.4°C | 19 mm | 48% | 3.4 m/s | 5.3 |
| 2015 | 28.0°C | 19.8°C | 11.6°C | 34.1°C | 7.3°C | 0 mm | 29% | 3.3 m/s | 6.7 |
| 2014 | 29.4°C | 20.8°C | 12.3°C | 39.0°C | 6.4°C | 3 mm | 28% | 3.2 m/s | 6.6 |
| 2013 🔥 | 33.5°C | 24.9°C | 16.3°C | 40.2°C | 11.2°C | 2 mm | 21% | 3.1 m/s | 6.4 |
| 2012 | 30.1°C | 21.3°C | 12.4°C | 39.5°C | 6.0°C | 1 mm | 25% | 3.4 m/s | 6.5 |
| 2011 | 29.0°C | 20.6°C | 12.1°C | 38.0°C | 5.8°C | 23 mm | 32% | 3.2 m/s | 6.2 |
| 2010 🌧️ | 25.0°C | 18.1°C | 11.2°C | 32.3°C | 6.6°C | 62 mm | 60% | 3.1 m/s | 5.3 |
| 2009 | 30.6°C | 22.4°C | 14.1°C | 40.0°C | 8.3°C | 0 mm | 25% | 3.4 m/s | 6.2 |
| 2008 | 30.5°C | 22.0°C | 13.6°C | 38.4°C | 8.1°C | 1 mm | 29% | 3.4 m/s | 6.3 |
| 2007 | 30.3°C | 21.7°C | 13.2°C | 40.0°C | 7.9°C | 0 mm | 23% | 3.3 m/s | 6.5 |
| 2006 | 30.5°C | 22.2°C | 13.8°C | 38.3°C | 7.1°C | 0 mm | 26% | 3.4 m/s | 6.6 |
| 2005 | 30.4°C | 22.0°C | 13.7°C | 39.3°C | 6.8°C | 12 mm | 32% | 3.1 m/s | 6.1 |
| 2004 | 28.3°C | 19.7°C | 11.2°C | 39.9°C | 4.8°C | 4 mm | 31% | 3.1 m/s | 6.4 |
| 2003 | 31.4°C | 22.7°C | 14.1°C | 41.1°C | 4.5°C | 16 mm | 25% | 3.2 m/s | 6.4 |
| 2002 | 30.3°C | 22.3°C | 14.3°C | 38.2°C | 7.3°C | 2 mm | 24% | 3.7 m/s | 6.2 |
| 2001 | 29.8°C | 21.6°C | 13.5°C | 39.1°C | 8.3°C | 1 mm | 30% | 3.4 m/s | 6.4 |
| 2000 | 32.4°C | 23.7°C | 15.1°C | 39.4°C | 9.2°C | 0 mm | 23% | 3 m/s | 6.4 |
| 1999 | 30.6°C | 22.6°C | 14.6°C | 38.8°C | 6.9°C | 3 mm | 29% | 3.4 m/s | 6.3 |
| 1998 | 29.1°C | 21.6°C | 14.1°C | 38.0°C | 7.6°C | 22 mm | 47% | 3.2 m/s | 6 |
| 1997 | 30.5°C | 22.5°C | 14.5°C | 37.2°C | 9.6°C | 1 mm | 30% | 3.3 m/s | 6 |
| 1996 | 28.3°C | 20.0°C | 11.7°C | 36.3°C | 5.3°C | 6 mm | 41% | 3.1 m/s | 6.3 |
| 1995 | 28.6°C | 20.7°C | 12.9°C | 36.9°C | 5.3°C | 6 mm | 35% | 3.1 m/s | 5.8 |
| 1994 | 27.9°C | 19.5°C | 11.2°C | 32.0°C | 7.0°C | 0 mm | 26% | 3 m/s | 6.4 |
| 1993 | 27.7°C | 19.9°C | 12.2°C | 36.5°C | 6.6°C | 14 mm | 35% | 3.7 m/s | 6.2 |
| 1992 | 27.4°C | 19.6°C | 11.8°C | 35.0°C | 7.2°C | 2 mm | 35% | 3.4 m/s | 6.2 |
| 1991 | 30.1°C | 22.0°C | 14.0°C | 36.9°C | 8.3°C | 0 mm | 26% | 3.3 m/s | 6.4 |
| 1990 | 29.2°C | 21.0°C | 12.8°C | 37.0°C | 6.3°C | 1 mm | 32% | 3.5 m/s | 6.5 |
| 1989 | 28.3°C | 19.7°C | 11.1°C | 37.0°C | 6.0°C | 0 mm | 31% | 3.2 m/s | 6.7 |
| 1988 | 29.4°C | 20.8°C | 12.2°C | 38.4°C | 6.2°C | 0 mm | 33% | 3.3 m/s | 6.3 |
| 1987 | 28.8°C | 20.4°C | 12.0°C | 35.5°C | 7.0°C | 2 mm | 30% | 3.4 m/s | 6 |
| 1986 | 27.1°C | 19.0°C | 11.0°C | 36.2°C | 4.3°C | 1 mm | 42% | 3.1 m/s | 6.5 |
| 1985 | 26.1°C | 18.2°C | 10.2°C | 35.3°C | 5.6°C | 0 mm | 29% | 3.7 m/s | 7 |
| 1984 ❄️ | 25.1°C | 17.4°C | 9.6°C | 35.4°C | 4.9°C | 10 mm | 35% | 3.3 m/s | 6.5 |
| 1983 | 30.8°C | 22.6°C | 14.4°C | 36.9°C | 8.6°C | 2 mm | 28% | 3.3 m/s | — |
| 1982 | 27.9°C | 20.2°C | 12.6°C | 35.6°C | 6.4°C | 3 mm | 30% | 3.5 m/s | — |
| 1981 | 30.1°C | 21.9°C | 13.6°C | 38.0°C | 4.7°C | 1 mm | 35% | 3.1 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 29.3°C with lows near 12.9°C (mean 21.1°C), based on 45 years of NASA POWER data.
September averages 6 mm of rainfall in Birdsville, about average for rainfall. The wettest on record was 62 mm in 2010.
The hottest September reached 42.2°C in 2017. The coldest dipped to 4.3°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.7°C. Daytime highs moved from 28°C to 29.9°C and overnight lows from 12.1°C to 13.7°C over the same span.
September is one of the cooler months of the year in Birdsville and about average for rainfall, so plan for around 29.3°C daytime highs and 12.9°C at night.
Not quite — September is the 5th coolest month in Birdsville, averaging 21.1°C.
For September in Birdsville, pack light layers you can adjust through the day, with typical highs of 29.3°C and lows of 12.9°C.
Relative humidity in September averages 31% — relatively dry.
Average wind speed in September is 3.3 m/s. The windiest September on record averaged 3.8 m/s (2024).
The wettest September on record was 2010 with 62 mm. On average, September sees 6 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 Birdsville 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.
