September is close to Broome's year-round average, with average highs near 35.9°C and lows around 20.6°C (mean 28.3°C). It is one of the drier months, averaging 1 mm of rainfall and 47% relative humidity across the period.
September is close to Broome's year-round average. Across 45 years of records, the warmest September in Broome was 2024 — when the month averaged 31°C — while the coldest was 2004 at 26.2°C. Typical September days reach 35.9°C with nights near 20.6°C. The long-term trend is warming, about 0.2°C per decade.
September is one of the drier months in Broome, averaging 1 mm of rainfall. The wettest Septembers on record were 1984 and 2022 with 11 mm, while the driest were 2009, 2015 and 2017, among others at 0 mm.
Relative humidity in Broome during September averages 47%. The most humid September was 2005 at 59%, and the least humid was 2015 at 38%.
September receives about 6.8 kWh/m²/day of solar energy in Broome. The sunniest Septembers were 2015, 2019 and 2020, among others at 7.1 kWh/m²/day, and the cloudiest were 1993, 1998 and 2024 at 6.4.
Average wind speed in Broome during September is 3.1 m/s. The windiest September was 2010 at 3.8 m/s, while the calmest was 2023 at 2.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 28.2°C | 28.0°C | 28.0°C | 28.0°C | 29.3°C | +1.1°C |
| Avg High | 35.8°C | 35.6°C | 35.7°C | 35.9°C | 36.7°C | +0.9°C |
| Avg Low | 20.7°C | 20.4°C | 20.3°C | 20.1°C | 21.9°C | +1.2°C |
| Avg Rain | 2 mm | 1 mm | 0 mm | 1 mm | 4 mm | +2 mm |
September temperatures in Broome have risen by about 0.8°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 12.5°C (2004) to a record high of 42.1°C (1983).
Rainfall in September is one of the drier months, averaging 1 mm, with a wettest year of 11 mm.
A good time to visit Broome
September is a good time to visit Broome, with days averaging 35.9°C and nights around 20.6°C (mean 28.3°C, close to Broome's yearly average) and low rainfall. July and June 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 | 35.8°C | 28.3°C | 20.9°C | 39.3°C | 17.7°C | 0 mm | 42% | 3.2 m/s | 6.9 |
| 2024 🔥 | 37.4°C | 31.0°C | 24.5°C | 40.4°C | 21.4°C | 8 mm | 48% | 3.1 m/s | 6.4 |
| 2023 | 37.2°C | 29.3°C | 21.5°C | 41.1°C | 17.2°C | 1 mm | 47% | 2.5 m/s | 6.8 |
| 2022 | 36.0°C | 28.7°C | 21.4°C | 41.9°C | 17.9°C | 11 mm | 47% | 3.1 m/s | 6.8 |
| 2021 | 35.9°C | 28.5°C | 21.1°C | 39.0°C | 18.1°C | 0 mm | 40% | 3.5 m/s | 7 |
| 2020 | 38.1°C | 30.1°C | 22.1°C | 40.4°C | 19.1°C | 0 mm | 45% | 2.7 m/s | 7.1 |
| 2019 | 36.0°C | 27.6°C | 19.2°C | 39.0°C | 15.0°C | 1 mm | 42% | 2.9 m/s | 7.1 |
| 2018 | 36.8°C | 28.6°C | 20.5°C | 39.2°C | 15.1°C | 1 mm | 40% | 3 m/s | 6.9 |
| 2017 | 36.1°C | 28.3°C | 20.5°C | 39.2°C | 18.3°C | 0 mm | 42% | 3.3 m/s | 7 |
| 2016 | 35.1°C | 28.2°C | 21.4°C | 38.2°C | 17.5°C | 0 mm | 48% | 3.1 m/s | 6.9 |
| 2015 | 36.4°C | 28.1°C | 19.8°C | 39.7°C | 16.7°C | 0 mm | 38% | 2.9 m/s | 7.1 |
| 2014 | 36.8°C | 28.2°C | 19.5°C | 41.0°C | 15.3°C | 0 mm | 46% | 3 m/s | 7.1 |
| 2013 | 35.4°C | 27.8°C | 20.3°C | 38.7°C | 17.3°C | 0 mm | 55% | 2.9 m/s | 7 |
| 2012 | 36.9°C | 28.6°C | 20.3°C | 40.4°C | 18.3°C | 0 mm | 45% | 2.8 m/s | 7 |
| 2011 | 35.0°C | 26.8°C | 18.5°C | 39.1°C | 13.6°C | 0 mm | 38% | 3.5 m/s | 7 |
| 2010 | 34.5°C | 27.6°C | 20.8°C | 40.5°C | 16.5°C | 10 mm | 45% | 3.8 m/s | 6.5 |
| 2009 | 36.4°C | 28.7°C | 21.1°C | 39.6°C | 19.9°C | 0 mm | 46% | 3.3 m/s | 6.9 |
| 2008 | 37.3°C | 29.5°C | 21.6°C | 39.9°C | 19.5°C | 1 mm | 45% | 2.9 m/s | 6.8 |
| 2007 | 36.9°C | 28.5°C | 20.1°C | 40.7°C | 17.1°C | 0 mm | 43% | 3.1 m/s | 7 |
| 2006 | 36.7°C | 28.4°C | 20.1°C | 40.9°C | 16.3°C | 0 mm | 51% | 2.6 m/s | 6.9 |
| 2005 | 34.7°C | 27.9°C | 21.2°C | 38.9°C | 19.2°C | 0 mm | 59% | 3.2 m/s | 6.6 |
| 2004 ❄️ | 34.1°C | 26.2°C | 18.4°C | 38.2°C | 12.5°C | 1 mm | 46% | 3.1 m/s | 6.8 |
| 2003 | 34.5°C | 27.4°C | 20.3°C | 41.4°C | 16.6°C | 0 mm | 54% | 3.2 m/s | 6.7 |
| 2002 | 34.3°C | 26.8°C | 19.4°C | 40.5°C | 17.1°C | 1 mm | 57% | 3.2 m/s | 6.8 |
| 2001 | 35.5°C | 28.0°C | 20.6°C | 39.9°C | 13.1°C | 0 mm | 45% | 3.2 m/s | 6.7 |
| 2000 | 36.8°C | 28.5°C | 20.2°C | 40.2°C | 16.6°C | 1 mm | 45% | 2.8 m/s | 6.7 |
| 1999 | 36.8°C | 28.6°C | 20.3°C | 39.9°C | 16.5°C | 1 mm | 46% | 2.7 m/s | 6.8 |
| 1998 | 36.4°C | 29.1°C | 21.9°C | 41.5°C | 18.6°C | 0 mm | 50% | 3 m/s | 6.4 |
| 1997 | 35.5°C | 28.0°C | 20.5°C | 40.5°C | 17.7°C | 0 mm | 58% | 2.8 m/s | 6.8 |
| 1996 | 35.5°C | 27.7°C | 20.0°C | 40.0°C | 18.2°C | 0 mm | 48% | 3.2 m/s | 6.7 |
| 1995 | 35.5°C | 28.6°C | 21.6°C | 39.9°C | 17.4°C | 2 mm | 58% | 3.3 m/s | 6.6 |
| 1994 | 36.6°C | 28.2°C | 19.8°C | 40.4°C | 16.9°C | 0 mm | 44% | 2.9 m/s | 6.7 |
| 1993 | 34.0°C | 27.2°C | 20.4°C | 36.9°C | 13.8°C | 2 mm | 48% | 3.3 m/s | 6.4 |
| 1992 | 34.6°C | 27.3°C | 20.0°C | 40.0°C | 13.5°C | 0 mm | 48% | 3.2 m/s | 6.7 |
| 1991 | 35.4°C | 27.5°C | 19.6°C | 39.9°C | 16.2°C | 1 mm | 47% | 3.2 m/s | 6.9 |
| 1990 | 35.8°C | 27.9°C | 20.1°C | 39.4°C | 16.1°C | 0 mm | 44% | 3.2 m/s | 6.8 |
| 1989 | 37.2°C | 29.0°C | 20.8°C | 42.1°C | 16.2°C | 0 mm | 39% | 3.2 m/s | 6.8 |
| 1988 | 36.9°C | 28.6°C | 20.2°C | 40.9°C | 15.8°C | 0 mm | 40% | 3.2 m/s | 6.8 |
| 1987 | 35.5°C | 27.2°C | 19.0°C | 38.3°C | 15.4°C | 0 mm | 43% | 3 m/s | 6.7 |
| 1986 | 34.4°C | 27.3°C | 20.2°C | 39.7°C | 13.8°C | 2 mm | 51% | 3.2 m/s | 6.8 |
| 1985 | 35.9°C | 28.0°C | 20.0°C | 38.8°C | 17.0°C | 0 mm | 41% | 3.1 m/s | 6.8 |
| 1984 🌧️ | 33.8°C | 27.0°C | 20.2°C | 38.2°C | 16.2°C | 11 mm | 51% | 3.2 m/s | 6.5 |
| 1983 | 37.2°C | 29.1°C | 21.1°C | 42.1°C | 17.9°C | 0 mm | 46% | 3 m/s | — |
| 1982 | 34.9°C | 28.6°C | 22.3°C | 40.1°C | 19.7°C | 2 mm | 52% | 3 m/s | — |
| 1981 | 36.6°C | 29.4°C | 22.1°C | 39.8°C | 18.8°C | 1 mm | 43% | 3.2 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 35.9°C with lows near 20.6°C (mean 28.3°C), based on 45 years of NASA POWER data.
September averages 1 mm of rainfall in Broome, one of the drier months. The wettest on record was 11 mm in 1984.
The hottest September reached 42.1°C in 1983. The coldest dipped to 12.5°C in 2004.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 0.8°C. Daytime highs moved from 35.7°C to 36.5°C and overnight lows from 21.1°C to 21.9°C over the same span.
September is close to Broome's year-round average and one of the drier months, so plan for around 35.9°C daytime highs and 20.6°C at night.
Not quite — September is the 5th coolest month in Broome, averaging 28.3°C.
For September in Broome, pack light, breathable clothing and sun protection, with typical highs of 35.9°C and lows of 20.6°C.
Relative humidity in September averages 47% — relatively dry.
Average wind speed in September is 3.1 m/s. The windiest September on record averaged 3.8 m/s (2010).
The wettest September on record was 1984 with 11 mm. On average, September sees 1 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 Broome 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.
