Yes

you do need a jacket based on the weather in Turramurra NSW 2074, Australia 1 second ago

Why? Because it's cool. Pleasantly cool, but cool.
58°F14°C & Cloudy

Wind is 8 mph13 km/h from the SW, gusting to 20 mph32 km/h
April 19
1pm58°F14°C9 mph14 km/h SWCloudy
2pm57°F14°C8 mph14 km/h SWCloudy
3pm56°F14°C8 mph14 km/h SWCloudy
4pm56°F13°C9 mph14 km/h SWCloudy
5pm57°F14°C9 mph15 km/h SWCloudy
6pm58°F15°C10 mph16 km/h SDrizzle
7pm60°F16°C11 mph18 km/h SDrizzle
8pm62°F17°C12 mph19 km/h SDrizzle
9pm64°F18°C12 mph20 km/h SDrizzle
10pm65°F18°C13 mph21 km/h SMostly Cloudy
11pm66°F19°C13 mph22 km/h SMostly Cloudy
April 20
12am65°F18°C13 mph22 km/h SMostly Cloudy
DateLowHighWindDayNight
April 1956°F13°C66°F19°C12 mph19 km/h from SDrizzlePartly Cloudy
April 2052°F11°C70°F21°C7 mph11 km/h from SPartly CloudyMostly Clear
April 2150°F10°C74°F23°C5 mph7 km/h from SEMostly ClearClear
April 2252°F11°C78°F26°C6 mph9 km/h from NClearMostly Clear
April 2355°F13°C78°F26°C6 mph10 km/h from NWMostly CloudyPartly Cloudy
April 2451°F11°C71°F22°C8 mph12 km/h from SMostly ClearMostly Clear
April 2548°F9°C68°F20°C7 mph11 km/h from SMostly ClearMostly Clear

Yes

Low of 53°F12°C, High of 71°F22°C
Wind: 7 mph11 km/h
Precipitation: None

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