Yes

you do need a jacket based on the weather in Melbourne VIC 3004, Australia 1 second ago

Why? Because it's fairly windy outside!
67°F19°C & Cloudy

Wind is 11 mph18 km/h from the N, gusting to 21 mph33 km/h
October 17
11am66°F19°C12 mph19 km/h NRain
12pm65°F19°C13 mph21 km/h NRain
1pm64°F18°C14 mph22 km/h NERain
2pm63°F17°C12 mph20 km/h NERain
3pm64°F18°C14 mph23 km/h NRain
4pm65°F18°C16 mph27 km/h NRain
5pm66°F19°C17 mph27 km/h NDrizzle
6pm68°F20°C16 mph26 km/h NDrizzle
7pm70°F21°C15 mph24 km/h NDrizzle
8pm73°F23°C14 mph23 km/h NWDrizzle
9pm74°F23°C14 mph22 km/h NWRain
10pm72°F22°C12 mph20 km/h NWRain
DateLowHighWindDayNight
October 1757°F14°C74°F23°C14 mph22 km/h from NWRainDrizzle
October 1853°F11°C65°F18°C11 mph18 km/h from SWPartly CloudyMostly Cloudy
October 1952°F11°C66°F19°C10 mph16 km/h from SMostly CloudyPartly Cloudy
October 2049°F10°C76°F24°C4 mph7 km/h from SMostly ClearMostly Cloudy
October 2153°F12°C82°F28°C8 mph12 km/h from NWMostly CloudyMostly Cloudy
October 2252°F11°C71°F21°C7 mph11 km/h from SWMostly CloudyPartly Cloudy
October 2346°F8°C59°F15°C14 mph22 km/h from SWPartly CloudyPartly Cloudy

Yes

Low of 53°F12°C, High of 65°F19°C
Wind: 11 mph18 km/h
Precipitation: 2% rain

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