Yes

you do need a jacket based on the weather in Glen Waverley VIC 3150, Australia 1 second ago

Why? Because it's so windy, you’re practically horizontal just trying to walk!
65°F18°C & Mostly Cloudy

Wind is 11 mph18 km/h from the West, gusting to 29 mph46 km/h
September 27
12am65°F18°C11 mph18 km/h WestMostly Clear
1am65°F19°C12 mph19 km/h WestPartly Cloudy
2am65°F18°C12 mph19 km/h WestMostly Clear
3am63°F17°C11 mph18 km/h WestPartly Cloudy
4am61°F16°C9 mph15 km/h WestPartly Cloudy
5am59°F15°C8 mph13 km/h WestMostly Cloudy
6am57°F14°C7 mph12 km/h WestMostly Cloudy
7am55°F13°C7 mph11 km/h WestMostly Cloudy
8am54°F12°C7 mph11 km/h WestCloudy
9am53°F12°C6 mph9 km/h WestCloudy
10am52°F11°C5 mph9 km/h WestMostly Cloudy
11am51°F11°C6 mph9 km/h WestPartly Cloudy
DateLowHighWindDayNight
September 2647°F8°C65°F19°C9 mph15 km/h from NorthwestMostly ClearPartly Cloudy
September 2746°F8°C61°F16°C5 mph8 km/h from SouthwestMostly CloudyMostly Clear
September 2843°F6°C69°F20°C7 mph12 km/h from NorthPartly CloudyDrizzle
September 2949°F10°C64°F18°C9 mph15 km/h from NorthwestRainRain
September 3046°F8°C61°F16°C12 mph19 km/h from NorthwestDrizzleMostly Cloudy
October 146°F8°C55°F13°C10 mph16 km/h from WestDrizzleDrizzle
October 246°F8°C60°F16°C10 mph16 km/h from SouthwestMostly CloudyMostly Cloudy

Yes

Low of 46°F8°C, High of 61°F16°C
Wind: 5 mph8 km/h
Precipitation: None

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