September is one of the cooler months of the year in Woomera, with average highs near 24.7°C and lows around 9°C (mean 16.9°C). It is about average for rainfall, averaging 12 mm of rainfall and 47% relative humidity across the period.
September is one of the cooler months of the year in Woomera. Across 45 years of records, the warmest September in Woomera was 2013 — when the month averaged 20.2°C — while the coldest was 1984 at 13.8°C. Typical September days reach 24.7°C with nights near 9°C. The long-term trend is warming, about 0.3°C per decade.
September is about average for rainfall in Woomera, averaging 12 mm of rainfall. The wettest September on record was 2005 with 46 mm, while the driest was 2006 at 0 mm.
Relative humidity in Woomera during September averages 47%. The most humid September was 2010 at 64%, and the least humid was 2007 at 36%.
September receives about 5.5 kWh/m²/day of solar energy in Woomera. The sunniest Septembers were 1985, 1994 and 2023 at 5.9 kWh/m²/day, and the cloudiest was 1997 at 5.
Average wind speed in Woomera during September is 3.7 m/s. The windiest Septembers were 1996 and 2009 at 4.4 m/s, while the calmest was 2004 at 3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 16.1°C | 16.6°C | 17.4°C | 16.9°C | 17.5°C | +1.4°C |
| Avg High | 23.9°C | 24.2°C | 25.3°C | 24.8°C | 25.5°C | +1.6°C |
| Avg Low | 8.3°C | 8.9°C | 9.4°C | 9.0°C | 9.5°C | +1.2°C |
| Avg Rain | 9 mm | 15 mm | 16 mm | 10 mm | 10 mm | +1 mm |
September temperatures in Woomera have risen by about 1.3°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 2.6°C (1995) to a record high of 37.6°C (1998).
Rainfall in September is about average for rainfall, averaging 12 mm, with a wettest year of 46 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.4°C per decade while lows rose 0.2°C per decade, widening the gap between day and night.
A good time to visit Woomera
September is a good time to visit Woomera, with days averaging 24.7°C and nights around 9°C (mean 16.9°C, cooler than Woomera's yearly average) and low rainfall. November 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 | 25.5°C | 17.5°C | 9.5°C | 34.3°C | 4.9°C | 6 mm | 46% | 3.6 m/s | 5.5 |
| 2024 | 24.8°C | 16.8°C | 8.8°C | 34.2°C | 4.5°C | 4 mm | 40% | 3.6 m/s | 5.4 |
| 2023 | 27.9°C | 19.3°C | 10.8°C | 36.8°C | 3.8°C | 2 mm | 37% | 3.2 m/s | 5.9 |
| 2022 | 23.6°C | 16.1°C | 8.6°C | 29.0°C | 3.9°C | 17 mm | 54% | 3.6 m/s | 5.2 |
| 2021 | 25.1°C | 16.9°C | 8.6°C | 32.1°C | 4.2°C | 3 mm | 43% | 3.7 m/s | 5.7 |
| 2020 | 25.9°C | 18.2°C | 10.5°C | 33.0°C | 3.2°C | 26 mm | 46% | 4 m/s | 5.4 |
| 2019 | 26.6°C | 18.0°C | 9.3°C | 33.3°C | 4.6°C | 6 mm | 38% | 3.3 m/s | 5.7 |
| 2018 | 23.8°C | 15.7°C | 7.6°C | 31.4°C | 3.4°C | 2 mm | 38% | 3.3 m/s | 5.7 |
| 2017 | 25.1°C | 17.1°C | 9.2°C | 36.0°C | 4.6°C | 7 mm | 42% | 3.8 m/s | 5.5 |
| 2016 | 22.0°C | 14.7°C | 7.4°C | 31.0°C | 3.9°C | 24 mm | 53% | 3.9 m/s | 5.4 |
| 2015 | 23.9°C | 15.9°C | 8.0°C | 31.6°C | 4.5°C | 5 mm | 49% | 3.2 m/s | 5.7 |
| 2014 | 25.5°C | 17.6°C | 9.7°C | 35.1°C | 5.2°C | 6 mm | 46% | 3.6 m/s | 5.7 |
| 2013 🔥 | 28.7°C | 20.2°C | 11.7°C | 34.9°C | 6.5°C | 8 mm | 45% | 3.7 m/s | 5.6 |
| 2012 | 25.9°C | 17.5°C | 9.2°C | 37.2°C | 4.5°C | 0 mm | 40% | 3.8 m/s | 5.8 |
| 2011 | 25.3°C | 17.2°C | 9.2°C | 34.9°C | 4.5°C | 8 mm | 42% | 3.9 m/s | 5.8 |
| 2010 | 21.6°C | 15.0°C | 8.4°C | 27.4°C | 4.2°C | 32 mm | 64% | 3.6 m/s | 5.1 |
| 2009 | 25.3°C | 17.6°C | 10.0°C | 35.4°C | 5.4°C | 18 mm | 46% | 4.4 m/s | 5.5 |
| 2008 | 25.6°C | 17.3°C | 9.1°C | 37.0°C | 4.8°C | 2 mm | 40% | 3.5 m/s | 5.8 |
| 2007 | 26.4°C | 17.9°C | 9.4°C | 36.9°C | 4.5°C | 1 mm | 36% | 3.7 m/s | 5.8 |
| 2006 | 26.4°C | 18.2°C | 10.0°C | 32.2°C | 5.9°C | 0 mm | 38% | 3.6 m/s | 5.8 |
| 2005 🌧️ | 23.8°C | 16.4°C | 9.1°C | 33.3°C | 3.7°C | 46 mm | 54% | 3.8 m/s | 5.3 |
| 2004 | 23.7°C | 16.1°C | 8.5°C | 34.0°C | 3.2°C | 34 mm | 51% | 3 m/s | 5.1 |
| 2003 | 25.4°C | 17.1°C | 8.8°C | 33.8°C | 3.3°C | 11 mm | 48% | 3.7 m/s | 5.5 |
| 2002 | 25.1°C | 16.8°C | 8.6°C | 32.5°C | 4.8°C | 6 mm | 45% | 4.1 m/s | 5.7 |
| 2001 | 24.7°C | 17.3°C | 9.9°C | 34.8°C | 4.6°C | 28 mm | 53% | 3.7 m/s | 5.4 |
| 2000 | 27.0°C | 18.8°C | 10.5°C | 37.0°C | 5.5°C | 13 mm | 49% | 3.6 m/s | 5.4 |
| 1999 | 26.6°C | 18.9°C | 11.1°C | 35.5°C | 5.3°C | 8 mm | 43% | 3.9 m/s | 5.4 |
| 1998 | 25.4°C | 17.7°C | 9.9°C | 37.6°C | 5.1°C | 13 mm | 51% | 3.6 m/s | 5.3 |
| 1997 | 23.1°C | 16.2°C | 9.4°C | 27.8°C | 5.7°C | 33 mm | 58% | 3.2 m/s | 5 |
| 1996 | 23.8°C | 16.3°C | 8.8°C | 33.6°C | 4.4°C | 30 mm | 51% | 4.4 m/s | 5.5 |
| 1995 | 24.2°C | 16.4°C | 8.6°C | 30.4°C | 2.6°C | 10 mm | 47% | 3.5 m/s | 5.5 |
| 1994 | 23.8°C | 15.7°C | 7.6°C | 29.6°C | 3.4°C | 4 mm | 47% | 3.5 m/s | 5.9 |
| 1993 | 23.9°C | 16.5°C | 9.0°C | 34.3°C | 4.5°C | 6 mm | 48% | 3.7 m/s | 5.5 |
| 1992 | 21.2°C | 14.1°C | 7.0°C | 26.7°C | 3.0°C | 36 mm | 57% | 3.6 m/s | 5.2 |
| 1991 | 25.3°C | 17.3°C | 9.3°C | 33.4°C | 4.7°C | 1 mm | 44% | 4 m/s | 5.6 |
| 1990 | 25.1°C | 16.7°C | 8.3°C | 37.1°C | 3.9°C | 7 mm | 46% | 3.6 m/s | 5.8 |
| 1989 | 23.2°C | 15.2°C | 7.2°C | 32.4°C | 3.5°C | 2 mm | 55% | 3.6 m/s | 5.8 |
| 1988 | 25.3°C | 17.4°C | 9.5°C | 33.7°C | 4.6°C | 6 mm | 40% | 4 m/s | 5.7 |
| 1987 | 24.7°C | 17.0°C | 9.3°C | 35.0°C | 4.2°C | 8 mm | 47% | 3.4 m/s | 5.4 |
| 1986 | 22.9°C | 15.4°C | 7.8°C | 31.1°C | 3.0°C | 2 mm | 54% | 3.4 m/s | 5.5 |
| 1985 | 21.7°C | 14.2°C | 6.7°C | 28.3°C | 2.9°C | 0 mm | 50% | 3.7 m/s | 5.9 |
| 1984 ❄️ | 21.2°C | 13.8°C | 6.4°C | 26.8°C | 3.2°C | 29 mm | 54% | 3.9 m/s | 5.4 |
| 1983 | 25.5°C | 17.5°C | 9.5°C | 33.4°C | 6.4°C | 10 mm | 47% | 3.9 m/s | — |
| 1982 | 23.8°C | 16.3°C | 8.7°C | 32.5°C | 3.5°C | 7 mm | 44% | 3.4 m/s | — |
| 1981 | 26.8°C | 18.3°C | 9.9°C | 36.5°C | 3.6°C | 13 mm | 43% | 3.3 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 24.7°C with lows near 9°C (mean 16.9°C), based on 45 years of NASA POWER data.
September averages 12 mm of rainfall in Woomera, about average for rainfall. The wettest on record was 46 mm in 2005.
The hottest September reached 37.6°C in 1998. The coldest dipped to 2.6°C in 1995.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.3°C. Daytime highs moved from 23.8°C to 25.4°C and overnight lows from 8.2°C to 9.3°C over the same span.
September is one of the cooler months of the year in Woomera and about average for rainfall, so plan for around 24.7°C daytime highs and 9°C at night.
Not quite — September is the 5th coolest month in Woomera, averaging 16.9°C.
For September in Woomera, pack light layers you can adjust through the day, with typical highs of 24.7°C and lows of 9°C.
Relative humidity in September averages 47% — relatively dry.
Average wind speed in September is 3.7 m/s. The windiest September on record averaged 4.4 m/s (1996).
The wettest September on record was 2005 with 46 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 Woomera 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.
