Yes

you do need a jacket based on the weather in Sydney NSW, Australia 11 minutes ago

Why? Because the wind could blow a wig clean off your head!
60°F16°C & Cloudy

Wind is 12 mph20 km/h from the Southeast, gusting to 22 mph36 km/h
May 19
2pm60°F16°C12 mph20 km/h SoutheastMostly Cloudy
3pm60°F16°C13 mph21 km/h SoutheastPartly Cloudy
4pm61°F16°C11 mph18 km/h SoutheastMostly Cloudy
5pm61°F16°C12 mph19 km/h SoutheastMostly Cloudy
6pm62°F17°C13 mph20 km/h SoutheastDrizzle
7pm63°F17°C12 mph20 km/h SoutheastMostly Cloudy
8pm65°F18°C13 mph20 km/h SoutheastMostly Cloudy
9pm66°F19°C13 mph21 km/h SoutheastMostly Cloudy
10pm66°F19°C12 mph19 km/h SoutheastMostly Cloudy
11pm66°F19°C12 mph19 km/h SoutheastMostly Cloudy
May 20
12am67°F20°C11 mph18 km/h SoutheastMostly Cloudy
1am67°F19°C11 mph18 km/h SoutheastMostly Cloudy
DateLowHighWindDayNight
May 1959°F15°C67°F20°C11 mph18 km/h from SoutheastDrizzleDrizzle
May 2061°F16°C67°F20°C6 mph10 km/h from SoutheastDrizzleRain
May 2160°F16°C65°F19°C11 mph18 km/h from SoutheastRainRain
May 2260°F15°C71°F21°C8 mph13 km/h from NortheastRainRain
May 2358°F14°C71°F22°C7 mph12 km/h from NorthwestDrizzleMostly Clear
May 2455°F13°C67°F19°C7 mph12 km/h from NorthMostly CloudyMostly Clear
May 2551°F11°C66°F19°C12 mph20 km/h from NorthwestMostly ClearClear

No

Low of 61°F16°C, High of 67°F20°C
Wind: 6 mph10 km/h
Precipitation: 73% rain

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