September is one of the cooler months of the year in Mildura, with average highs near 22.1°C and lows around 7.6°C (mean 14.9°C). It is about average for rainfall, averaging 24 mm of rainfall and 57% relative humidity across the period.
September is one of the cooler months of the year in Mildura. Across 45 years of records, the warmest September in Mildura was 2013 — when the month averaged 17.9°C — while the coldest were 1984 and 1992 at 12.1°C. Typical September days reach 22.1°C with nights near 7.6°C. The long-term trend is warming, about 0.4°C per decade.
September is about average for rainfall in Mildura, averaging 24 mm of rainfall. The wettest September on record was 1992 with 71 mm, while the driest was 2018 at 1 mm.
Relative humidity in Mildura during September averages 57%. The most humid September was 2010 at 70%, and the least humid was 2018 at 46%.
September receives about 5 kWh/m²/day of solar energy in Mildura. The sunniest September was 2018 at 5.6 kWh/m²/day, and the cloudiest were 2005, 2016 and 2022 at 4.4.
Average wind speed in Mildura during September is 3.2 m/s. The windiest September was 1996 at 4 m/s, while the calmest was 1997 at 2.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.2°C | 14.3°C | 15.2°C | 15.0°C | 15.7°C | +1.5°C |
| Avg High | 21.5°C | 21.4°C | 22.6°C | 22.3°C | 23.0°C | +1.5°C |
| Avg Low | 7.0°C | 7.2°C | 7.8°C | 7.8°C | 8.5°C | +1.5°C |
| Avg Rain | 24 mm | 34 mm | 22 mm | 21 mm | 18 mm | -6 mm |
September temperatures in Mildura have risen by about 1.7°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 0°C (1995) to a record high of 37.1°C (2003).
Rainfall in September is about average for rainfall, averaging 24 mm, with a wettest year of 71 mm.
A good time to visit Mildura
September is a good time to visit Mildura, with days averaging 22.1°C and nights around 7.6°C (mean 14.9°C, cooler than Mildura'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 | 23.2°C | 15.9°C | 8.6°C | 30.5°C | 5.5°C | 14 mm | 54% | 3.3 m/s | 4.9 |
| 2024 | 23.6°C | 15.8°C | 8.1°C | 32.7°C | 2.7°C | 6 mm | 49% | 3.3 m/s | 5.1 |
| 2023 | 25.8°C | 17.7°C | 9.5°C | 36.8°C | 2.3°C | 2 mm | 47% | 2.7 m/s | 5.4 |
| 2022 | 20.1°C | 14.1°C | 8.1°C | 24.8°C | 3.9°C | 47 mm | 67% | 3.1 m/s | 4.4 |
| 2021 | 22.6°C | 15.1°C | 7.6°C | 32.5°C | 3.8°C | 14 mm | 55% | 3.2 m/s | 5.1 |
| 2020 | 22.8°C | 15.8°C | 8.8°C | 28.0°C | 2.4°C | 22 mm | 56% | 3.2 m/s | 4.8 |
| 2019 | 23.2°C | 15.2°C | 7.3°C | 32.1°C | 2.8°C | 9 mm | 50% | 3.2 m/s | 5.3 |
| 2018 | 22.3°C | 14.5°C | 6.6°C | 29.7°C | 3.6°C | 1 mm | 46% | 2.9 m/s | 5.6 |
| 2017 | 23.0°C | 15.6°C | 8.2°C | 34.1°C | 2.4°C | 4 mm | 49% | 3.6 m/s | 4.9 |
| 2016 | 20.3°C | 14.0°C | 7.6°C | 27.4°C | 4.3°C | 69 mm | 63% | 3.4 m/s | 4.4 |
| 2015 | 22.0°C | 14.5°C | 7.0°C | 32.7°C | 3.1°C | 12 mm | 54% | 2.7 m/s | 5.4 |
| 2014 | 22.1°C | 15.0°C | 7.9°C | 31.4°C | 3.7°C | 21 mm | 57% | 3.1 m/s | 5.1 |
| 2013 🔥 | 25.2°C | 17.9°C | 10.6°C | 31.8°C | 5.0°C | 22 mm | 54% | 3.4 m/s | 4.8 |
| 2012 | 22.7°C | 15.2°C | 7.8°C | 35.8°C | 4.4°C | 10 mm | 52% | 3.2 m/s | 5.1 |
| 2011 | 23.0°C | 15.3°C | 7.7°C | 31.6°C | 2.2°C | 12 mm | 54% | 3.3 m/s | 5 |
| 2010 | 19.3°C | 13.1°C | 7.0°C | 23.6°C | 3.6°C | 47 mm | 70% | 2.9 m/s | 4.6 |
| 2009 | 22.9°C | 15.4°C | 7.8°C | 33.0°C | 4.3°C | 33 mm | 53% | 3.5 m/s | 5 |
| 2008 | 22.9°C | 15.0°C | 7.1°C | 33.5°C | 3.0°C | 8 mm | 52% | 3 m/s | 5.3 |
| 2007 | 23.2°C | 15.6°C | 7.9°C | 29.6°C | 3.4°C | 3 mm | 49% | 3.4 m/s | 5.3 |
| 2006 | 23.7°C | 15.9°C | 8.1°C | 32.3°C | 3.3°C | 14 mm | 49% | 3.3 m/s | 5.4 |
| 2005 | 21.0°C | 14.4°C | 7.7°C | 30.1°C | 3.9°C | 44 mm | 61% | 3 m/s | 4.4 |
| 2004 | 21.6°C | 14.5°C | 7.3°C | 33.1°C | 1.8°C | 13 mm | 60% | 2.7 m/s | 4.7 |
| 2003 | 21.7°C | 14.3°C | 7.0°C | 37.1°C | 2.1°C | 5 mm | 60% | 3.7 m/s | 5.1 |
| 2002 | 23.1°C | 15.4°C | 7.7°C | 32.7°C | 1.6°C | 9 mm | 48% | 3.5 m/s | 5.1 |
| 2001 | 23.5°C | 16.2°C | 8.9°C | 33.5°C | 3.8°C | 49 mm | 57% | 3.2 m/s | 4.8 |
| 2000 | 22.4°C | 15.4°C | 8.4°C | 30.4°C | 5.2°C | 38 mm | 63% | 3.1 m/s | 4.8 |
| 1999 | 23.4°C | 16.1°C | 8.8°C | 32.2°C | 3.5°C | 13 mm | 55% | 2.9 m/s | 4.9 |
| 1998 | 23.4°C | 16.1°C | 8.8°C | 33.2°C | 4.0°C | 34 mm | 58% | 3.2 m/s | 4.7 |
| 1997 | 20.9°C | 14.3°C | 7.7°C | 26.0°C | 3.5°C | 53 mm | 62% | 2.5 m/s | 4.8 |
| 1996 | 20.8°C | 13.9°C | 7.0°C | 31.2°C | 1.8°C | 29 mm | 59% | 4 m/s | 4.7 |
| 1995 | 21.9°C | 14.5°C | 7.0°C | 28.3°C | 0.0°C | 29 mm | 59% | 2.7 m/s | 4.9 |
| 1994 | 20.9°C | 13.3°C | 5.7°C | 28.7°C | 2.5°C | 20 mm | 55% | 3.1 m/s | 5.2 |
| 1993 | 20.9°C | 14.2°C | 7.5°C | 32.0°C | 2.4°C | 50 mm | 64% | 2.9 m/s | 4.6 |
| 1992 🌧️ | 18.2°C | 12.1°C | 6.0°C | 24.5°C | 1.9°C | 71 mm | 67% | 3 m/s | 4.6 |
| 1991 | 22.1°C | 14.5°C | 6.9°C | 29.4°C | 2.9°C | 25 mm | 59% | 3.3 m/s | 5 |
| 1990 | 21.9°C | 14.3°C | 6.8°C | 33.3°C | 3.3°C | 13 mm | 61% | 3.1 m/s | 5.3 |
| 1989 | 21.2°C | 14.1°C | 6.9°C | 30.0°C | 2.4°C | 12 mm | 62% | 3.1 m/s | 5.2 |
| 1988 | 22.6°C | 15.3°C | 8.1°C | 32.4°C | 3.0°C | 44 mm | 58% | 3.2 m/s | 4.9 |
| 1987 | 22.3°C | 14.7°C | 7.1°C | 33.5°C | 1.6°C | 17 mm | 60% | 2.9 m/s | 5.1 |
| 1986 | 21.0°C | 14.0°C | 7.1°C | 28.3°C | 2.1°C | 29 mm | 63% | 3 m/s | 4.8 |
| 1985 | 20.2°C | 13.2°C | 6.2°C | 25.6°C | 2.7°C | 10 mm | 58% | 3.2 m/s | 5.5 |
| 1984 ❄️ | 18.8°C | 12.1°C | 5.3°C | 28.0°C | 2.0°C | 24 mm | 61% | 3.4 m/s | 4.8 |
| 1983 | 21.8°C | 14.6°C | 7.5°C | 29.6°C | 2.6°C | 26 mm | 60% | 3.3 m/s | — |
| 1982 | 22.1°C | 14.5°C | 6.8°C | 32.3°C | 1.1°C | 25 mm | 48% | 3.2 m/s | — |
| 1981 | 23.2°C | 15.7°C | 8.1°C | 33.9°C | 4.6°C | 29 mm | 59% | 2.9 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 22.1°C with lows near 7.6°C (mean 14.9°C), based on 45 years of NASA POWER data.
September averages 24 mm of rainfall in Mildura, about average for rainfall. The wettest on record was 71 mm in 1992.
The hottest September reached 37.1°C in 2003. The coldest dipped to 0°C in 1995.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.7°C. Daytime highs moved from 21.2°C to 23.1°C and overnight lows from 6.8°C to 8.4°C over the same span.
September is one of the cooler months of the year in Mildura and about average for rainfall, so plan for around 22.1°C daytime highs and 7.6°C at night.
Not quite — September is the 5th coolest month in Mildura, averaging 14.9°C.
For September in Mildura, pack warm layers and a jacket for chilly mornings, with typical highs of 22.1°C and lows of 7.6°C.
Relative humidity in September averages 57% — moderately humid.
Average wind speed in September is 3.2 m/s. The windiest September on record averaged 4 m/s (1996).
The wettest September on record was 1992 with 71 mm. On average, September sees 24 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 Mildura 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.
