Yes

you do need a jacket based on the weather in Roseville NSW 2069, Australia 1 second ago

Why? Because it's cool. Pleasantly cool, but cool.
57°F14°C & Clear

Wind is 4 mph7 km/h from the W, gusting to 9 mph15 km/h
September 22
11am56°F13°C5 mph7 km/h NWClear
12pm54°F12°C4 mph7 km/h NWClear
1pm53°F12°C4 mph7 km/h NWClear
2pm52°F11°C4 mph7 km/h NWClear
3pm51°F11°C5 mph7 km/h NWClear
4pm51°F11°C5 mph8 km/h NWClear
5pm55°F13°C5 mph8 km/h NWClear
6pm61°F16°C5 mph9 km/h NWClear
7pm67°F19°C6 mph9 km/h NWClear
8pm72°F22°C5 mph8 km/h NWClear
9pm75°F24°C5 mph8 km/h NWClear
10pm77°F25°C5 mph7 km/h NWClear
DateLowHighWindDayNight
September 2251°F11°C80°F27°C5 mph7 km/h from NWClearPartly Cloudy
September 2355°F13°C77°F25°C6 mph10 km/h from NEMostly CloudyMostly Cloudy
September 2462°F17°C83°F29°C10 mph16 km/h from NWCloudyRain
September 2552°F11°C63°F17°C15 mph24 km/h from SRainRain
September 2649°F10°C63°F17°C10 mph17 km/h from SEDrizzleRain
September 2752°F11°C68°F20°C12 mph19 km/h from ERainPartly Cloudy
September 2853°F12°C77°F25°C7 mph11 km/h from NPartly CloudyPartly Cloudy

Yes

Low of 55°F13°C, High of 77°F25°C
Wind: 6 mph10 km/h
Precipitation: None

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