Yes

you do need a jacket based on the weather in Woonona NSW 2517, Australia 1 second ago

Why? Because it's pretty chilly.
57°F14°C & Clear

Wind is 6 mph9 km/h from the NW, gusting to 14 mph22 km/h
September 24
6pm59°F15°C7 mph12 km/h NWClear
7pm63°F17°C8 mph13 km/h NClear
8pm67°F20°C8 mph13 km/h NClear
9pm72°F22°C8 mph12 km/h NClear
10pm75°F24°C7 mph11 km/h NClear
11pm77°F25°C6 mph10 km/h NEMostly Clear
September 25
12am78°F25°C6 mph9 km/h NEMostly Clear
1am76°F24°C6 mph10 km/h NEMostly Clear
2am72°F22°C7 mph11 km/h EMostly Clear
3am69°F20°C7 mph11 km/h NEPartly Cloudy
4am65°F19°C6 mph9 km/h NEPartly Cloudy
5am63°F17°C5 mph8 km/h NMostly Cloudy
DateLowHighWindDayNight
September 2451°F10°C78°F26°C7 mph11 km/h from NMostly ClearPartly Cloudy
September 2555°F13°C70°F21°C7 mph11 km/h from SEPartly CloudyMostly Cloudy
September 2655°F13°C71°F21°C5 mph8 km/h from EMostly CloudyRain
September 2755°F13°C69°F20°C6 mph9 km/h from EPartly CloudyClear
September 2853°F12°C83°F28°C8 mph13 km/h from WClearClear
September 2957°F14°C77°F25°C7 mph12 km/h from NEMostly ClearMostly Clear
September 3059°F15°C88°F31°C10 mph16 km/h from NWPartly CloudyMostly Clear

Yes

Low of 55°F13°C, High of 70°F21°C
Wind: 7 mph11 km/h
Precipitation: None

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