The coldest month in Melbourne is July, by a small margin over June and August. July’s long-term average maximum is 13.5°C and average minimum is 6.5°C. Across a 30-year measurement period (1991–2020), July edges out June and August by roughly 0.5°C on the maximum and 1.0°C on the minimum. For practical purposes, the three winter months — June, July, August — are within a degree of each other.
The Verified Numbers
Source: Bureau of Meteorology, Melbourne climate averages (station 086071), 1991–2020 reference period.
| Month | Max (°C) | Min (°C) | Rainfall (mm) | Rain days |
|---|---|---|---|---|
| May | 16.7 | 9.6 | 57 | 14 |
| June | 14.1 | 7.5 | 49 | 14 |
| July | 13.5 | 6.5 | 48 | 16 |
| August | 14.9 | 7.0 | 50 | 16 |
| September | 17.3 | 8.4 | 58 | 14 |
July is the only month in Melbourne’s record where the average maximum is below 14°C. It’s also the second-driest of the cool-season months (June is similar) — winter is wet by Melbourne’s monthly count of rain days but the totals are modest compared to spring or autumn.
All-Time Cold Records
Melbourne’s coldest recorded temperatures, all in winter months:
- Coldest minimum: -2.8°C, recorded 21 July 1869 at the original Flagstaff observatory
- Coldest maximum: 4.4°C, recorded 24 July 1873
- Coldest July average minimum in modern records: 4.5°C (2005)
In modern Melbourne (last 30 years), overnight temperatures below 1°C are rare in the CBD but more common in the outer eastern suburbs (Lilydale, Eltham, Belgrave) where frost is occasional.
Why July Is the Coldest
July is the coldest month for the same reason it is in most southern-hemisphere temperate cities: the winter solstice falls on 21 June, but ocean and land thermal lag means the coldest month falls 4–6 weeks later. Melbourne’s climate is moderated by Port Phillip Bay and the Southern Ocean, which keeps the city milder than equivalent inland Australian cities (Canberra, Bendigo) but also slows the seasonal temperature swing.
How July Compares Internationally
For UK readers comparing:
- Melbourne July: 13.5°C max, 6.5°C min — close to London February (8°C max, 3°C min) but milder
- Melbourne July vs London July: Melbourne is 8°C colder by daytime maximum
- Melbourne July vs New York January: Melbourne is 7°C warmer
For Australian readers:
- Melbourne vs Sydney July: Melbourne is 3.5°C colder by maximum
- Melbourne vs Brisbane July: Melbourne is 7.5°C colder
- Melbourne vs Hobart July: Melbourne is 1.5°C warmer
What the Coldest Month Actually Feels Like
July in Melbourne practical reality:
- Need a coat outdoors all day
- Heated buildings indoors at 21–22°C
- Trams and trains heated
- Outdoor cafe seating closed at most venues
- AFL season at peak — outdoor sport in cold weather is normal
- Sunset around 5.15pm (shortest daylight ~9 hours 30 minutes)
For UK visitors used to British winters, Melbourne July feels comparable to London March or April — colder than expected from “Australia,” milder than feared.
What This Means for You
If you’re planning a visit to Melbourne and trying to avoid the cold, avoid late June through early August. If you’re trying to experience proper Melbourne winter — fireplaces, AFL, hot ramen, long indoor lunches — July is the most authentic month. If weather is non-negotiable, September has milder days at 17°C+ but still has the winter cultural infrastructure running.
For the full Melbourne winter context, see Melbourne winter guide 2026 and does Melbourne get cold.
Dr. Priya Nair covers research-based content for MELBZ.
