Yes

you do need a jacket based on the weather in Mornington VIC 3931, Australia 1 second ago

Why? Because there's a refreshing nip in the air!
49°F9°C & Mostly Cloudy

Wind is 4 mph6 km/h from the North, gusting to 7 mph11 km/h
June 4
4pm49°F9°C5 mph8 km/h NorthMostly Cloudy
5pm49°F9°C5 mph9 km/h NorthMostly Cloudy
6pm49°F9°C6 mph10 km/h NorthMostly Cloudy
7pm50°F10°C7 mph11 km/h NorthwestMostly Cloudy
8pm51°F11°C8 mph12 km/h NorthwestMostly Cloudy
9pm53°F11°C7 mph11 km/h NorthwestPartly Cloudy
10pm54°F12°C5 mph9 km/h NorthwestPartly Cloudy
11pm55°F13°C4 mph6 km/h NorthwestPartly Cloudy
June 5
12am56°F13°C4 mph7 km/h NorthMostly Cloudy
1am56°F13°C4 mph7 km/h NorthCloudy
2am56°F13°C3 mph5 km/h NorthMostly Cloudy
3am54°F12°C3 mph6 km/h NortheastMostly Cloudy
DateLowHighWindDayNight
June 447°F8°C56°F13°C5 mph9 km/h from NorthMostly CloudyCloudy
June 549°F9°C56°F13°C22 mph36 km/h from NorthDrizzleRain
June 649°F9°C55°F13°C21 mph34 km/h from NorthwestRainRain
June 746°F8°C51°F11°C15 mph25 km/h from WestRainRain
June 844°F7°C51°F11°C14 mph22 km/h from NorthwestRainDrizzle
June 948°F9°C57°F14°C15 mph24 km/h from SouthwestDrizzleDrizzle
June 1048°F9°C55°F13°C11 mph18 km/h from SouthwestDrizzleDrizzle

Yes

Low of 49°F10°C, High of 56°F14°C
Wind: 22 mph36 km/h
Precipitation: 39% rain

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