September is one of the cooler months of the year in Broken Hill, with average highs near 23°C and lows around 8°C (mean 15.5°C). It is about average for rainfall, averaging 17 mm of rainfall and 50% relative humidity across the period.
September is one of the cooler months of the year in Broken Hill. Across 45 years of records, the warmest September in Broken Hill was 2013 — when the month averaged 18.8°C — while the coldest was 1984 at 12.3°C. Typical September days reach 23°C with nights near 8°C. The long-term trend is warming, about 0.4°C per decade.
September is about average for rainfall in Broken Hill, averaging 17 mm of rainfall. The wettest September on record was 2022 with 55 mm, while the driest were 2017 and 2018 at 0 mm.
Relative humidity in Broken Hill during September averages 50%. The most humid September was 2010 at 66%, and the least humid was 2019 at 37%.
September receives about 5.8 kWh/m²/day of solar energy in Broken Hill. The sunniest September was 1989 at 6.4 kWh/m²/day, and the cloudiest were 2005, 2016 and 2022 at 5.1.
Average wind speed in Broken Hill during September is 3.4 m/s. The windiest September was 1996 at 4.2 m/s, while the calmest was 2004 at 2.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.7°C | 15.0°C | 16.0°C | 15.6°C | 16.4°C | +1.7°C |
| Avg High | 22.1°C | 22.4°C | 23.7°C | 23.1°C | 24.0°C | +1.9°C |
| Avg Low | 7.3°C | 7.7°C | 8.3°C | 8.1°C | 8.9°C | +1.6°C |
| Avg Rain | 13 mm | 26 mm | 17 mm | 11 mm | 19 mm | +6 mm |
September temperatures in Broken Hill have risen by about 1.8°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 0.1°C (1995) to a record high of 37.3°C (2003).
Rainfall in September is about average for rainfall, averaging 17 mm, with a wettest year of 55 mm.
A good time to visit Broken Hill
September is a good time to visit Broken Hill, with days averaging 23°C and nights around 8°C (mean 15.5°C, cooler than Broken Hill's yearly average) and low rainfall. November and March 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 | 23.8°C | 16.4°C | 9.0°C | 30.9°C | 4.0°C | 11 mm | 48% | 3.4 m/s | 5.6 |
| 2024 | 23.8°C | 16.0°C | 8.3°C | 33.8°C | 2.4°C | 8 mm | 42% | 3.6 m/s | 5.7 |
| 2023 | 26.7°C | 18.6°C | 10.4°C | 35.4°C | 2.5°C | 1 mm | 38% | 3 m/s | 6 |
| 2022 🌧️ | 21.2°C | 14.6°C | 8.1°C | 26.8°C | 2.9°C | 55 mm | 61% | 3.5 m/s | 5.1 |
| 2021 | 23.6°C | 15.8°C | 8.1°C | 31.8°C | 4.2°C | 5 mm | 45% | 3.4 m/s | 5.8 |
| 2020 | 24.6°C | 17.2°C | 9.7°C | 33.4°C | 2.8°C | 37 mm | 47% | 3.6 m/s | 5.6 |
| 2019 | 24.9°C | 16.6°C | 8.2°C | 32.7°C | 3.4°C | 0 mm | 37% | 3.3 m/s | 6.2 |
| 2018 | 22.8°C | 15.1°C | 7.3°C | 30.4°C | 2.5°C | 0 mm | 38% | 3.1 m/s | 6.2 |
| 2017 | 24.3°C | 16.5°C | 8.7°C | 35.9°C | 3.9°C | 0 mm | 39% | 3.6 m/s | 5.8 |
| 2016 | 20.6°C | 14.0°C | 7.5°C | 28.3°C | 3.8°C | 19 mm | 56% | 3.6 m/s | 5.1 |
| 2015 | 22.4°C | 14.9°C | 7.4°C | 31.7°C | 3.9°C | 3 mm | 49% | 3.2 m/s | 5.9 |
| 2014 | 22.3°C | 15.1°C | 7.9°C | 30.2°C | 3.1°C | 22 mm | 56% | 3.2 m/s | 5.8 |
| 2013 🔥 | 26.7°C | 18.8°C | 11.0°C | 33.5°C | 5.5°C | 6 mm | 46% | 3.4 m/s | 5.8 |
| 2012 | 23.1°C | 15.3°C | 7.6°C | 35.5°C | 3.6°C | 4 mm | 46% | 3.3 m/s | 5.9 |
| 2011 | 23.9°C | 15.9°C | 7.9°C | 31.4°C | 3.1°C | 13 mm | 48% | 3.7 m/s | 5.7 |
| 2010 | 20.2°C | 13.7°C | 7.3°C | 26.0°C | 3.1°C | 40 mm | 66% | 3.2 m/s | 5.2 |
| 2009 | 24.3°C | 16.5°C | 8.7°C | 31.8°C | 4.2°C | 9 mm | 45% | 3.9 m/s | 5.7 |
| 2008 | 23.1°C | 15.3°C | 7.6°C | 32.6°C | 3.3°C | 26 mm | 50% | 3 m/s | 5.8 |
| 2007 | 24.2°C | 16.2°C | 8.2°C | 31.8°C | 4.1°C | 0 mm | 41% | 3.4 m/s | 6.1 |
| 2006 | 24.5°C | 16.7°C | 8.8°C | 31.4°C | 3.8°C | 3 mm | 43% | 3.4 m/s | 6.2 |
| 2005 | 22.2°C | 15.1°C | 8.1°C | 31.7°C | 3.2°C | 44 mm | 57% | 3.3 m/s | 5.1 |
| 2004 | 22.0°C | 14.7°C | 7.3°C | 31.8°C | 0.8°C | 27 mm | 55% | 2.8 m/s | 5.6 |
| 2003 | 23.6°C | 15.7°C | 7.7°C | 37.3°C | 2.0°C | 1 mm | 51% | 3.8 m/s | 5.7 |
| 2002 | 24.1°C | 16.2°C | 8.2°C | 33.9°C | 2.3°C | 4 mm | 39% | 3.8 m/s | 6 |
| 2001 | 24.0°C | 16.6°C | 9.2°C | 33.9°C | 3.9°C | 38 mm | 51% | 3.6 m/s | 5.3 |
| 2000 | 25.2°C | 17.2°C | 9.3°C | 34.6°C | 4.5°C | 17 mm | 51% | 3.3 m/s | 6 |
| 1999 | 24.6°C | 17.1°C | 9.5°C | 33.3°C | 3.7°C | 11 mm | 44% | 3.2 m/s | 5.4 |
| 1998 | 23.4°C | 16.2°C | 9.1°C | 34.6°C | 4.2°C | 38 mm | 56% | 3.2 m/s | 5.3 |
| 1997 | 21.7°C | 15.0°C | 8.3°C | 25.7°C | 4.2°C | 34 mm | 57% | 2.9 m/s | 5.5 |
| 1996 | 22.1°C | 14.7°C | 7.2°C | 32.5°C | 2.8°C | 33 mm | 53% | 4.2 m/s | 5.7 |
| 1995 | 22.6°C | 15.2°C | 7.9°C | 29.3°C | 0.1°C | 29 mm | 51% | 3.1 m/s | 5.8 |
| 1994 | 22.0°C | 14.2°C | 6.5°C | 31.1°C | 2.3°C | 15 mm | 48% | 3.2 m/s | 6.2 |
| 1993 | 21.3°C | 14.4°C | 7.4°C | 30.9°C | 2.4°C | 43 mm | 57% | 3 m/s | 5.5 |
| 1992 | 19.8°C | 13.0°C | 6.1°C | 24.5°C | 1.8°C | 36 mm | 58% | 3.4 m/s | 5.5 |
| 1991 | 23.3°C | 15.5°C | 7.7°C | 29.3°C | 3.6°C | 3 mm | 47% | 3.7 m/s | 6.2 |
| 1990 | 22.9°C | 15.0°C | 7.1°C | 33.1°C | 3.5°C | 18 mm | 53% | 3.3 m/s | 6.3 |
| 1989 | 21.8°C | 14.2°C | 6.6°C | 29.5°C | 2.5°C | 2 mm | 58% | 3.2 m/s | 6.4 |
| 1988 | 23.4°C | 15.9°C | 8.4°C | 33.0°C | 2.1°C | 10 mm | 51% | 3.3 m/s | 5.8 |
| 1987 | 22.5°C | 15.0°C | 7.5°C | 32.8°C | 1.4°C | 22 mm | 54% | 3 m/s | 6 |
| 1986 | 22.0°C | 14.7°C | 7.5°C | 29.5°C | 2.2°C | 20 mm | 56% | 3.4 m/s | 5.8 |
| 1985 | 20.0°C | 13.0°C | 6.1°C | 26.7°C | 2.4°C | 4 mm | 54% | 3.7 m/s | 6.2 |
| 1984 ❄️ | 19.4°C | 12.3°C | 5.2°C | 28.6°C | 2.0°C | 17 mm | 56% | 3.7 m/s | 6 |
| 1983 | 23.4°C | 15.9°C | 8.5°C | 32.8°C | 3.4°C | 10 mm | 51% | 3.7 m/s | — |
| 1982 | 22.3°C | 14.8°C | 7.4°C | 30.9°C | 2.0°C | 19 mm | 44% | 3.5 m/s | — |
| 1981 | 24.3°C | 16.4°C | 8.6°C | 32.7°C | 2.3°C | 16 mm | 51% | 3 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 23°C with lows near 8°C (mean 15.5°C), based on 45 years of NASA POWER data.
September averages 17 mm of rainfall in Broken Hill, about average for rainfall. The wettest on record was 55 mm in 2022.
The hottest September reached 37.3°C in 2003. The coldest dipped to 0.1°C in 1995.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.8°C. Daytime highs moved from 21.9°C to 23.8°C and overnight lows from 7.2°C to 8.8°C over the same span.
September is one of the cooler months of the year in Broken Hill and about average for rainfall, so plan for around 23°C daytime highs and 8°C at night.
Not quite — September is the 5th coolest month in Broken Hill, averaging 15.5°C.
For September in Broken Hill, pack light layers you can adjust through the day, with typical highs of 23°C and lows of 8°C.
Relative humidity in September averages 50% — relatively dry.
Average wind speed in September is 3.4 m/s. The windiest September on record averaged 4.2 m/s (1996).
The wettest September on record was 2022 with 55 mm. On average, September sees 17 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 Broken Hill 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.
