Melbourne Weather in September
Australia · Oceanic climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
September in Melbourne sees average temperatures ranging from a low of 8.2°C (46.8°F) to a high of 17.1°C (62.8°F), with a mean of 12.5°C (54.5°F). Compared to the annual average of 14.6°C (58.3°F), this month is 2.1°C cooler than the yearly norm. Precipitation averages 68.6mm, making it approximately 4.0mm drier than the monthly average of 72.0mm. The city receives an average of 9.1 hours of sunshine per day during September, with relative humidity averaging 72.5%. Wind speeds reach an average maximum of 23.8 km/h. For travelers, this month offers a temperature experience in Melbourne, with drier-than-average conditions compared to the rest of the year.
Melbourne's data reveals Australia's most unpredictable major city — four seasons in a day isn't a cliché, it's a statistical reality. I tracked a week there in November: 28°C Monday, 14°C Tuesday with rain, 22°C Wednesday. Annual mean of 15°C masks wild daily swings. The numbers favor February-March: 20-22°C, low rain, manageable UV. October-November is statistically pleasant but unpredictable. Summer (December-February) can hit 40°C; winter (June-August) dips to 6°C. Melbourne averages 600mm of rain spread evenly — 50mm monthly — so always carry a layer. The data says spring (October) is the smart traveler's pick.
September vs Adjacent Months
| Metric | August | September | October |
|---|---|---|---|
| Mean Temp | 10.9°C (51.6°F) | 12.5°C (54.5°F) | 13.8°C (56.8°F) |
| Rainfall | 58.0mm | 68.6mm | 117.9mm |
| Sunshine | 8.1 hrs | 9.1 hrs | 9.4 hrs |
| Humidity | 77.2% | 72.5% | 73.3% |
| Wind | 23.1 km/h | 23.8 km/h | 23.1 km/h |
| Rainy Days | 19.0 | 18.0 | 19.2 |
Seasonal Context
September falls in Autumn in the Northern Hemisphere. Autumn sees temperatures gradually cooling from summer highs. For travelers visiting Melbourne in September, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Melbourne in September?
The average temperature in Melbourne during September ranges from 8.2°C (46.8°F) to 17.1°C (62.8°F), with a mean of 12.5°C (54.5°F).
How much does it rain in Melbourne in September?
Melbourne receives an average of 68.6mm of precipitation in September, spread across approximately 18.0 rainy days.
What should I pack for Melbourne in September?
Based on September weather data, pack warm layers, a medium jacket, and waterproof outerwear.
Is September a good time to visit Melbourne?
September is a cooler month, suitable for travelers who prefer mild weather and fewer crowds. Pack warm layers and enjoy indoor attractions.
Other Months for Melbourne
Cities with Similar September Climate (Oceanic)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: -37.81°, 144.96°. Timezone: Australia/Melbourne. Last updated: 2026-07-30.