Yes

you do need a jacket based on the weather in Narre Warren North VIC 3804, Australia 1 second ago

Why? Because it's pretty chilly.
51°F10°C & Mostly Cloudy

Wind is 11 mph18 km/h from the NW, gusting to 29 mph46 km/h
September 20
9am50°F10°C11 mph18 km/h NWDrizzle
10am50°F10°C12 mph19 km/h NWDrizzle
11am50°F10°C12 mph20 km/h WDrizzle
12pm49°F9°C12 mph20 km/h WDrizzle
1pm48°F9°C12 mph19 km/h WCloudy
2pm48°F9°C11 mph17 km/h WMostly Cloudy
3pm47°F8°C9 mph15 km/h WMostly Cloudy
4pm47°F8°C8 mph14 km/h NWMostly Cloudy
5pm48°F9°C8 mph13 km/h NWCloudy
6pm49°F9°C9 mph15 km/h NWCloudy
7pm51°F11°C11 mph17 km/h NWMostly Cloudy
8pm53°F12°C12 mph19 km/h NWMostly Cloudy
DateLowHighWindDayNight
September 1947°F8°C60°F16°C7 mph12 km/h from NWRainRain
September 2047°F8°C61°F16°C11 mph17 km/h from WMostly CloudyCloudy
September 2150°F10°C64°F18°C10 mph16 km/h from WMostly CloudyMostly Clear
September 2250°F10°C64°F18°C8 mph14 km/h from NWPartly CloudyCloudy
September 2350°F10°C70°F21°C6 mph10 km/h from NCloudyDrizzle
September 2444°F7°C58°F15°C6 mph10 km/h from SWRainMostly Cloudy
September 2542°F6°C57°F14°C8 mph13 km/h from SPartly CloudyPartly Cloudy

Yes

Low of 47°F9°C, High of 61°F16°C
Wind: 11 mph17 km/h
Precipitation: 41% rain

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