Yes

you do need a jacket based on the weather in Gladesville NSW 2111, Australia 1 second ago

Why? Because it's so windy, your hat has officially retired from your head!
63°F17°C & Partly Cloudy

Wind is 9 mph15 km/h from the Southeast, gusting to 21 mph34 km/h
November 9
9am62°F17°C8 mph13 km/h SouthPartly Cloudy
10am61°F16°C6 mph9 km/h SouthPartly Cloudy
11am60°F16°C4 mph6 km/h SouthPartly Cloudy
12pm59°F15°C3 mph4 km/h SouthwestPartly Cloudy
1pm59°F15°C2 mph4 km/h SouthwestPartly Cloudy
2pm58°F15°C3 mph4 km/h SouthwestPartly Cloudy
3pm58°F14°C3 mph5 km/h SouthwestMostly Cloudy
4pm57°F14°C3 mph5 km/h SouthwestMostly Cloudy
5pm57°F14°C3 mph4 km/h WestPartly Cloudy
6pm56°F14°C2 mph3 km/h SouthwestMostly Cloudy
7pm56°F13°C2 mph3 km/h WestPartly Cloudy
8pm57°F14°C2 mph4 km/h WestMostly Clear
DateLowHighWindDayNight
November 859°F15°C70°F21°C10 mph15 km/h from SouthPartly CloudyPartly Cloudy
November 956°F13°C74°F23°C7 mph11 km/h from NortheastMostly ClearMostly Clear
November 1054°F12°C81°F27°C10 mph16 km/h from WestMostly ClearClear
November 1148°F9°C74°F23°C6 mph10 km/h from SouthClearClear
November 1251°F11°C83°F28°C6 mph9 km/h from NorthPartly CloudyMostly Cloudy
November 1360°F16°C76°F24°C7 mph11 km/h from SoutheastDrizzleThunderstorms
November 1463°F17°C84°F29°C10 mph15 km/h from NorthwestMostly CloudyPartly Cloudy

Yes

Low of 56°F14°C, High of 73°F23°C
Wind: 7 mph11 km/h
Precipitation: None

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