September is one of the warmer months of the year in Wyndham, with average highs near 37.4°C and lows around 22.4°C (mean 29.9°C). It is one of the drier months, averaging 6 mm of rainfall and 39% relative humidity across the period.
September is one of the warmer months of the year in Wyndham. Across 45 years of records, the warmest September in Wyndham was 2022 — when the month averaged 31.8°C — while the coldest was 2004 at 27.8°C. Typical September days reach 37.4°C with nights near 22.4°C. The long-term September temperature trend is broadly flat.
September is one of the drier months in Wyndham, averaging 6 mm of rainfall. The wettest September on record was 2020 with 53 mm, while the driest were 2017, 2023 and 2025, among others at 0 mm.
Relative humidity in Wyndham during September averages 39%. The most humid September was 2016 at 46%, and the least humid was 2015 at 28%.
September receives about 6.8 kWh/m²/day of solar energy in Wyndham. The sunniest Septembers were 1985 and 2015 at 7.2 kWh/m²/day, and the cloudiest were 2010 and 2024 at 6.3.
Average wind speed in Wyndham during September is 2.9 m/s. The windiest September was 1981 at 3.4 m/s, while the calmest was 1984 at 2.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 29.8°C | 29.7°C | 29.9°C | 29.7°C | 30.5°C | +0.7°C |
| Avg High | 37.2°C | 37.4°C | 37.4°C | 37.3°C | 37.6°C | +0.4°C |
| Avg Low | 22.4°C | 22.1°C | 22.4°C | 21.9°C | 23.5°C | +1.1°C |
| Avg Rain | 3 mm | 4 mm | 2 mm | 8 mm | 15 mm | +12 mm |
September temperatures in Wyndham have risen by about 0.8°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 13.5°C (2003) to a record high of 41.8°C (2020).
Rainfall in September is one of the drier months, averaging 6 mm, with a wettest year of 53 mm.
A good time to visit Wyndham
September is a good time to visit Wyndham, with days averaging 37.4°C and nights around 22.4°C (mean 29.9°C, warmer than Wyndham'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 | 37.1°C | 29.6°C | 22.1°C | 41.2°C | 14.2°C | 0 mm | 37% | 3.2 m/s | 6.8 |
| 2024 | 37.3°C | 30.9°C | 24.5°C | 40.9°C | 20.4°C | 22 mm | 43% | 3.2 m/s | 6.3 |
| 2023 | 37.0°C | 29.8°C | 22.6°C | 39.7°C | 17.3°C | 0 mm | 36% | 3.1 m/s | 6.6 |
| 2022 🔥 | 38.7°C | 31.8°C | 24.9°C | 41.5°C | 20.3°C | 17 mm | 42% | 2.7 m/s | 6.7 |
| 2021 | 37.3°C | 30.0°C | 22.6°C | 40.7°C | 15.1°C | 1 mm | 37% | 3.3 m/s | 6.8 |
| 2020 🌧️ | 38.1°C | 31.1°C | 24.1°C | 41.8°C | 21.3°C | 53 mm | 44% | 2.8 m/s | 6.7 |
| 2019 | 36.4°C | 28.5°C | 20.5°C | 39.5°C | 14.4°C | 4 mm | 36% | 3.1 m/s | 7.1 |
| 2018 | 37.6°C | 30.0°C | 22.3°C | 39.2°C | 17.0°C | 3 mm | 37% | 2.7 m/s | 6.9 |
| 2017 | 37.9°C | 29.6°C | 21.2°C | 40.9°C | 16.8°C | 0 mm | 31% | 3.1 m/s | 7.1 |
| 2016 | 37.8°C | 31.3°C | 24.8°C | 40.1°C | 20.8°C | 45 mm | 46% | 2.6 m/s | 6.4 |
| 2015 | 36.6°C | 28.5°C | 20.3°C | 38.4°C | 16.2°C | 0 mm | 28% | 3 m/s | 7.2 |
| 2014 | 37.4°C | 29.0°C | 20.7°C | 39.5°C | 14.1°C | 0 mm | 31% | 2.6 m/s | 7.1 |
| 2013 | 38.1°C | 30.6°C | 23.1°C | 41.0°C | 19.9°C | 2 mm | 39% | 2.7 m/s | 6.7 |
| 2012 | 37.8°C | 29.5°C | 21.2°C | 40.5°C | 16.7°C | 22 mm | 32% | 2.7 m/s | 7.1 |
| 2011 | 36.4°C | 28.5°C | 20.6°C | 39.7°C | 13.5°C | 0 mm | 34% | 2.9 m/s | 6.9 |
| 2010 | 37.3°C | 31.0°C | 24.7°C | 41.1°C | 19.8°C | 5 mm | 41% | 3.2 m/s | 6.3 |
| 2009 | 38.5°C | 31.1°C | 23.6°C | 40.1°C | 19.3°C | 0 mm | 37% | 2.8 m/s | 6.8 |
| 2008 | 37.9°C | 30.6°C | 23.4°C | 40.4°C | 18.2°C | 3 mm | 38% | 2.7 m/s | 6.7 |
| 2007 | 37.3°C | 29.3°C | 21.4°C | 40.2°C | 14.6°C | 1 mm | 35% | 2.7 m/s | 7 |
| 2006 | 36.1°C | 28.3°C | 20.4°C | 39.1°C | 15.2°C | 1 mm | 35% | 2.9 m/s | 7 |
| 2005 | 37.9°C | 31.0°C | 24.1°C | 39.9°C | 20.6°C | 5 mm | 44% | 2.7 m/s | 6.5 |
| 2004 ❄️ | 35.6°C | 27.8°C | 20.0°C | 39.9°C | 15.3°C | 0 mm | 34% | 3.1 m/s | 6.9 |
| 2003 | 37.9°C | 30.4°C | 23.0°C | 40.8°C | 13.5°C | 6 mm | 40% | 2.7 m/s | 6.4 |
| 2002 | 37.5°C | 30.0°C | 22.4°C | 40.6°C | 19.1°C | 1 mm | 45% | 2.7 m/s | 6.6 |
| 2001 | 37.6°C | 30.3°C | 23.0°C | 40.2°C | 14.3°C | 1 mm | 41% | 2.7 m/s | 6.7 |
| 2000 | 37.8°C | 30.1°C | 22.4°C | 39.8°C | 17.3°C | 2 mm | 39% | 2.7 m/s | 6.7 |
| 1999 | 37.1°C | 29.3°C | 21.5°C | 39.1°C | 15.1°C | 0 mm | 40% | 2.6 m/s | 6.9 |
| 1998 | 37.8°C | 30.7°C | 23.5°C | 40.2°C | 19.1°C | 25 mm | 41% | 2.9 m/s | 6.5 |
| 1997 | 37.6°C | 29.8°C | 22.1°C | 40.9°C | 18.6°C | 3 mm | 45% | 2.6 m/s | 6.7 |
| 1996 | 37.4°C | 28.7°C | 20.0°C | 39.9°C | 15.6°C | 0 mm | 36% | 2.8 m/s | 6.7 |
| 1995 | 38.3°C | 30.9°C | 23.4°C | 41.1°C | 19.9°C | 0 mm | 45% | 2.7 m/s | 6.6 |
| 1994 | 36.4°C | 28.4°C | 20.4°C | 39.6°C | 16.0°C | 0 mm | 37% | 2.9 m/s | 6.7 |
| 1993 | 36.7°C | 29.6°C | 22.5°C | 38.7°C | 19.0°C | 1 mm | 43% | 2.7 m/s | 6.8 |
| 1992 | 38.6°C | 31.3°C | 24.0°C | 41.4°C | 18.8°C | 5 mm | 44% | 2.6 m/s | 6.7 |
| 1991 | 37.8°C | 30.5°C | 23.1°C | 40.2°C | 20.0°C | 1 mm | 41% | 2.8 m/s | 6.7 |
| 1990 | 35.8°C | 28.0°C | 20.2°C | 38.0°C | 15.1°C | 0 mm | 33% | 3.2 m/s | 6.9 |
| 1989 | 38.1°C | 30.4°C | 22.7°C | 41.0°C | 16.7°C | 2 mm | 37% | 2.7 m/s | 7.1 |
| 1988 | 38.5°C | 30.9°C | 23.2°C | 40.8°C | 17.1°C | 2 mm | 36% | 2.8 m/s | 6.9 |
| 1987 | 36.5°C | 28.7°C | 20.9°C | 40.1°C | 16.4°C | 1 mm | 36% | 3 m/s | 6.6 |
| 1986 | 37.5°C | 30.3°C | 23.0°C | 40.9°C | 14.8°C | 3 mm | 42% | 2.9 m/s | 6.9 |
| 1985 | 36.7°C | 28.7°C | 20.8°C | 40.3°C | 16.1°C | 1 mm | 31% | 3.2 m/s | 7.2 |
| 1984 | 37.0°C | 29.6°C | 22.1°C | 38.7°C | 17.9°C | 7 mm | 41% | 2.5 m/s | 7 |
| 1983 | 38.1°C | 30.9°C | 23.7°C | 41.0°C | 19.2°C | 2 mm | 43% | 2.9 m/s | — |
| 1982 | 35.4°C | 28.2°C | 20.9°C | 39.2°C | 14.1°C | 1 mm | 45% | 2.8 m/s | — |
| 1981 | 37.1°C | 30.6°C | 24.1°C | 39.9°C | 19.7°C | 10 mm | 39% | 3.4 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 37.4°C with lows near 22.4°C (mean 29.9°C), based on 45 years of NASA POWER data.
September averages 6 mm of rainfall in Wyndham, one of the drier months. The wettest on record was 53 mm in 2020.
The hottest September reached 41.8°C in 2020. The coldest dipped to 13.5°C in 2003.
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 36.9°C to 37.5°C and overnight lows from 22.3°C to 23.3°C over the same span.
September is one of the warmer months of the year in Wyndham and one of the drier months, so plan for around 37.4°C daytime highs and 22.4°C at night.
Not quite — September is the 9th coolest month in Wyndham, averaging 29.9°C.
For September in Wyndham, pack light, breathable clothing and sun protection, with typical highs of 37.4°C and lows of 22.4°C.
Relative humidity in September averages 39% — relatively dry.
Average wind speed in September is 2.9 m/s. The windiest September on record averaged 3.4 m/s (1981).
The wettest September on record was 2020 with 53 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 Wyndham 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.
