Yes

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

Why? Because the cold's there, but it's just a reminder, not an invasion!
48°F9°C & Partly Cloudy

Wind is 6 mph10 km/h from the Northwest, gusting to 10 mph16 km/h
June 26
7pm49°F9°C7 mph11 km/h NorthwestMostly Cloudy
8pm50°F10°C7 mph11 km/h NorthwestMostly Cloudy
9pm51°F11°C7 mph11 km/h NorthwestMostly Cloudy
10pm52°F11°C6 mph10 km/h NorthwestMostly Cloudy
11pm53°F12°C6 mph9 km/h NorthwestMostly Cloudy
June 27
12am54°F12°C5 mph8 km/h NorthwestMostly Cloudy
1am54°F12°C4 mph7 km/h NorthwestMostly Cloudy
2am54°F12°C3 mph5 km/h NorthwestMostly Cloudy
3am53°F12°C3 mph5 km/h NorthMostly Cloudy
4am52°F11°C3 mph4 km/h NorthMostly Cloudy
5am52°F11°C3 mph4 km/h NorthMostly Cloudy
6am51°F10°C3 mph5 km/h NorthPartly Cloudy
DateLowHighWindDayNight
June 2646°F8°C54°F12°C5 mph8 km/h from NorthwestMostly CloudyPartly Cloudy
June 2747°F8°C55°F13°C6 mph9 km/h from NorthwestMostly ClearDrizzle
June 2847°F8°C54°F12°C7 mph11 km/h from WestDrizzleMostly Cloudy
June 2946°F8°C54°F12°C6 mph10 km/h from SouthDrizzleDrizzle
June 3045°F7°C53°F12°C7 mph10 km/h from SouthDrizzleDrizzle
July 146°F8°C56°F13°C9 mph14 km/h from SouthDrizzleDrizzle
July 246°F8°C55°F13°C3 mph4 km/h from WestDrizzleMostly Cloudy

Yes

Low of 46°F8°C, High of 55°F13°C
Wind: 6 mph9 km/h
Precipitation: None

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