September is one of the warmer months of the year in Victoria, with average highs near 18.3°C and lows around 12°C (mean 15.2°C). It is one of the drier months, averaging 48 mm of rainfall and 76% relative humidity across the period.
September is one of the warmer months of the year in Victoria. Across 45 years of records, the warmest September in Victoria was 1990 — when the month averaged 17°C — while the coldest was 1983 at 13.7°C. Typical September days reach 18.3°C with nights near 12°C. The long-term September temperature trend is broadly flat.
September is one of the drier months in Victoria, averaging 48 mm of rainfall. The wettest September on record was 2013 with 109 mm, while the driest was 1991 at 4 mm.
Relative humidity in Victoria during September averages 76%. The most humid September was 2025 at 89%, and the least humid was 1989 at 70%.
September receives about 4 kWh/m²/day of solar energy in Victoria. The sunniest Septembers were 1989, 1999 and 2012 at 4.6 kWh/m²/day, and the cloudiest was 2019 at 3.3.
Average wind speed in Victoria during September is 1.6 m/s. The windiest September was 1992 at 2.2 m/s, while the calmest were 1993, 1994 and 1995, among others at 1.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.7°C | 15.7°C | 14.9°C | 15.3°C | 15.2°C | +0.5°C |
| Avg High | 18.1°C | 19.1°C | 18.0°C | 18.3°C | 18.1°C | 0°C |
| Avg Low | 11.4°C | 12.5°C | 11.8°C | 12.3°C | 12.3°C | +0.9°C |
| Avg Rain | 48 mm | 34 mm | 41 mm | 59 mm | 61 mm | +13 mm |
September temperatures in Victoria have risen by about 0.5°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 7.1°C (1983) to a record high of 27.8°C (1981).
Rainfall in September is one of the drier months, averaging 48 mm, with a wettest year of 109 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.1°C per decade while lows rose 0.1°C per decade, narrowing the gap between day and night.
One of the best times to visit Victoria
September is one of the best times to visit Victoria. Expect days averaging 18.3°C and nights around 12°C (mean 15.2°C) — warmer than Victoria's yearly average — with moderate rainfall (48 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 16.8°C | 14.3°C | 11.8°C | 23.1°C | 9.7°C | 93 mm | 89% | 1.6 m/s | 3.9 |
| 2024 | 17.0°C | 14.4°C | 11.8°C | 23.2°C | 7.1°C | 52 mm | 84% | 1.4 m/s | 3.8 |
| 2023 | 18.1°C | 15.1°C | 12.1°C | 23.4°C | 8.6°C | 45 mm | 79% | 1.8 m/s | 4 |
| 2022 | 19.8°C | 16.3°C | 12.8°C | 27.0°C | 11.4°C | 5 mm | 76% | 1.6 m/s | 4.4 |
| 2021 | 17.4°C | 14.6°C | 11.8°C | 22.9°C | 9.7°C | 108 mm | 80% | 1.7 m/s | 3.6 |
| 2020 | 19.4°C | 16.3°C | 13.3°C | 27.1°C | 10.3°C | 63 mm | 79% | 1.5 m/s | 3.7 |
| 2019 | 17.7°C | 15.1°C | 12.4°C | 22.7°C | 7.6°C | 83 mm | 80% | 1.7 m/s | 3.3 |
| 2018 | 17.4°C | 14.6°C | 11.8°C | 23.4°C | 9.3°C | 64 mm | 79% | 1.6 m/s | 3.7 |
| 2017 | 19.3°C | 16.2°C | 13.1°C | 26.9°C | 9.4°C | 34 mm | 75% | 1.4 m/s | 3.8 |
| 2016 | 17.3°C | 14.5°C | 11.7°C | 21.3°C | 9.5°C | 45 mm | 79% | 1.6 m/s | 4 |
| 2015 | 17.2°C | 14.3°C | 11.5°C | 22.4°C | 9.0°C | 56 mm | 79% | 1.6 m/s | 3.8 |
| 2014 | 19.7°C | 16.4°C | 13.1°C | 26.0°C | 10.9°C | 56 mm | 74% | 1.6 m/s | 4.1 |
| 2013 🌧️ | 18.6°C | 15.7°C | 12.8°C | 26.6°C | 9.2°C | 109 mm | 81% | 1.6 m/s | 3.4 |
| 2012 | 19.0°C | 15.4°C | 11.9°C | 24.7°C | 9.4°C | 5 mm | 73% | 1.4 m/s | 4.6 |
| 2011 | 19.4°C | 16.0°C | 12.6°C | 26.4°C | 10.0°C | 36 mm | 75% | 1.7 m/s | 4 |
| 2010 | 17.4°C | 14.6°C | 11.8°C | 22.1°C | 10.1°C | 106 mm | 83% | 1.5 m/s | 3.4 |
| 2009 | 19.0°C | 15.5°C | 12.1°C | 25.8°C | 8.0°C | 48 mm | 74% | 1.7 m/s | 4.1 |
| 2008 | 18.1°C | 14.9°C | 11.6°C | 22.4°C | 9.0°C | 17 mm | 75% | 1.4 m/s | 4.1 |
| 2007 | 17.1°C | 14.2°C | 11.3°C | 22.7°C | 7.9°C | 45 mm | 78% | 1.7 m/s | 3.7 |
| 2006 | 19.0°C | 15.6°C | 12.1°C | 26.1°C | 9.6°C | 32 mm | 73% | 1.7 m/s | 4.3 |
| 2005 | 17.2°C | 14.3°C | 11.4°C | 20.7°C | 9.5°C | 46 mm | 77% | 1.5 m/s | 4.2 |
| 2004 | 16.4°C | 14.0°C | 11.5°C | 20.2°C | 9.4°C | 69 mm | 83% | 1.6 m/s | 3.6 |
| 2003 | 19.3°C | 15.8°C | 12.3°C | 26.0°C | 10.2°C | 34 mm | 75% | 1.5 m/s | 4.2 |
| 2002 | 18.1°C | 14.8°C | 11.6°C | 23.5°C | 8.3°C | 32 mm | 75% | 1.7 m/s | 4.2 |
| 2001 | 18.1°C | 15.0°C | 11.9°C | 22.0°C | 9.3°C | 29 mm | 77% | 1.6 m/s | 3.9 |
| 2000 | 18.0°C | 15.2°C | 12.3°C | 25.1°C | 9.2°C | 59 mm | 76% | 1.5 m/s | 3.8 |
| 1999 | 18.3°C | 14.8°C | 11.4°C | 22.8°C | 8.3°C | 13 mm | 74% | 1.7 m/s | 4.6 |
| 1998 | 19.7°C | 16.2°C | 12.7°C | 23.5°C | 10.6°C | 10 mm | 75% | 1.6 m/s | 4.5 |
| 1997 | 19.2°C | 16.3°C | 13.5°C | 23.9°C | 10.9°C | 103 mm | 77% | 1.6 m/s | 3.8 |
| 1996 | 17.0°C | 14.2°C | 11.4°C | 21.3°C | 7.6°C | 62 mm | 77% | 1.5 m/s | 3.7 |
| 1995 | 20.3°C | 16.9°C | 13.6°C | 24.1°C | 10.3°C | 34 mm | 73% | 1.3 m/s | 4.4 |
| 1994 | 19.8°C | 16.4°C | 12.9°C | 22.6°C | 10.7°C | 41 mm | 74% | 1.3 m/s | 4 |
| 1993 | 19.6°C | 15.9°C | 12.2°C | 25.4°C | 8.6°C | 8 mm | 70% | 1.3 m/s | 4.5 |
| 1992 | 16.8°C | 13.8°C | 10.9°C | 21.6°C | 8.3°C | 55 mm | 77% | 2.2 m/s | 4 |
| 1991 | 19.3°C | 15.9°C | 12.5°C | 24.5°C | 10.3°C | 4 mm | 74% | 1.3 m/s | 4.4 |
| 1990 🔥 | 20.6°C | 17.0°C | 13.4°C | 26.6°C | 10.8°C | 10 mm | 72% | 1.3 m/s | 4.2 |
| 1989 | 20.0°C | 16.0°C | 12.0°C | 23.6°C | 9.3°C | 6 mm | 70% | 1.4 m/s | 4.6 |
| 1988 | 18.4°C | 14.8°C | 11.3°C | 27.5°C | 8.7°C | 60 mm | 73% | 1.7 m/s | 3.8 |
| 1987 | 19.5°C | 15.7°C | 12.0°C | 24.6°C | 9.2°C | 14 mm | 71% | 1.5 m/s | 4.1 |
| 1986 | 16.9°C | 13.9°C | 10.9°C | 22.3°C | 8.1°C | 53 mm | 76% | 1.7 m/s | 3.7 |
| 1985 | 16.8°C | 13.8°C | 10.8°C | 20.6°C | 9.4°C | 45 mm | 73% | 1.7 m/s | 3.9 |
| 1984 | 17.1°C | 13.9°C | 10.8°C | 21.5°C | 7.4°C | 63 mm | 75% | 1.7 m/s | 3.6 |
| 1983 ❄️ | 16.7°C | 13.7°C | 10.7°C | 21.3°C | 7.1°C | 85 mm | 76% | 2 m/s | — |
| 1982 | 18.8°C | 15.5°C | 12.1°C | 24.2°C | 9.4°C | 35 mm | 75% | 1.4 m/s | — |
| 1981 | 18.6°C | 15.3°C | 11.9°C | 27.8°C | 9.0°C | 75 mm | 76% | 1.8 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 18.3°C with lows near 12°C (mean 15.2°C), based on 45 years of NASA POWER data.
September averages 48 mm of rainfall in Victoria, one of the drier months. The wettest on record was 109 mm in 2013.
The hottest September reached 27.8°C in 1981. The coldest dipped to 7.1°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 0.5°C. Daytime highs moved from 17.6°C to 17.8°C and overnight lows from 11.3°C to 12.1°C over the same span.
September is one of the warmer months of the year in Victoria and one of the drier months, so plan for around 18.3°C daytime highs and 12°C at night.
Not quite — September is the 10th coolest month in Victoria, averaging 15.2°C.
For September in Victoria, pack light layers you can adjust through the day, with typical highs of 18.3°C and lows of 12°C.
Relative humidity in September averages 76% — quite humid.
Average wind speed in September is 1.6 m/s. The windiest September on record averaged 2.2 m/s (1992).
The wettest September on record was 2013 with 109 mm. On average, September sees 48 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 Victoria 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.
