Yes

you do need a jacket based on the weather in Melbourne VIC, Australia 19 minutes ago

Why? Because it's quite chilly!
46°F8°C & Partly Cloudy

Wind is 8 mph13 km/h from the North, gusting to 19 mph30 km/h
July 18
12pm46°F8°C9 mph14 km/h NorthMostly Clear
1pm46°F8°C9 mph14 km/h NorthClear
2pm45°F7°C9 mph15 km/h NorthClear
3pm45°F7°C10 mph16 km/h NorthClear
4pm44°F7°C11 mph18 km/h NorthMostly Clear
5pm44°F7°C13 mph20 km/h NorthMostly Cloudy
6pm45°F7°C13 mph21 km/h NorthMostly Cloudy
7pm46°F8°C14 mph23 km/h NorthMostly Cloudy
8pm49°F9°C14 mph22 km/h NorthMostly Cloudy
9pm51°F10°C16 mph26 km/h NorthWindy
10pm53°F12°C17 mph28 km/h NorthWindy
11pm56°F13°C18 mph29 km/h NorthWindy
DateLowHighWindDayNight
July 1844°F7°C57°F14°C14 mph22 km/h from NorthMostly CloudyMostly Clear
July 1942°F5°C56°F13°C4 mph7 km/h from NorthMostly CloudyMostly Clear
July 2041°F5°C58°F15°C10 mph16 km/h from NorthMostly CloudyMostly Cloudy
July 2147°F9°C55°F13°C15 mph24 km/h from NorthRainClear
July 2244°F6°C56°F13°C8 mph13 km/h from NorthMostly ClearMostly Clear
July 2343°F6°C58°F14°C8 mph12 km/h from NorthPartly CloudyMostly Cloudy
July 2447°F8°C54°F12°C9 mph15 km/h from NortheastDrizzleDrizzle

Yes

Low of 42°F6°C, High of 56°F14°C
Wind: 4 mph7 km/h
Precipitation: None

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