Yes

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

Why? Because you're not freezing, but you’ll definitely start complaining if it lasts much longer!
49°F10°C & Mostly Cloudy

Wind is 11 mph17 km/h from the West, gusting to 17 mph28 km/h
September 22
4pm50°F10°C11 mph18 km/h WestMostly Cloudy
5pm50°F10°C11 mph18 km/h WestMostly Cloudy
6pm52°F11°C12 mph19 km/h WestMostly Cloudy
7pm53°F12°C13 mph20 km/h WestMostly Cloudy
8pm55°F13°C13 mph21 km/h WestMostly Cloudy
9pm56°F13°C13 mph21 km/h WestMostly Cloudy
10pm57°F14°C12 mph20 km/h WestCloudy
11pm58°F15°C11 mph18 km/h NorthwestCloudy
September 23
12am59°F15°C12 mph19 km/h WestCloudy
1am59°F15°C11 mph18 km/h WestCloudy
2am59°F15°C12 mph19 km/h WestCloudy
3am59°F15°C12 mph19 km/h WestCloudy
DateLowHighWindDayNight
September 2249°F10°C59°F15°C12 mph19 km/h from WestCloudyCloudy
September 2352°F11°C57°F14°C12 mph19 km/h from WestDrizzleDrizzle
September 2451°F11°C60°F15°C14 mph23 km/h from WestDrizzleDrizzle
September 2552°F11°C62°F17°C15 mph24 km/h from NorthwestDrizzleMostly Clear
September 2650°F10°C60°F16°C14 mph23 km/h from NorthwestPartly CloudyPartly Cloudy
September 2748°F9°C58°F14°C8 mph13 km/h from SouthwestMostly CloudyMostly Cloudy
September 2846°F8°C61°F16°C7 mph11 km/h from NorthCloudyRain

Yes

Low of 52°F11°C, High of 57°F14°C
Wind: 12 mph19 km/h
Precipitation: 42% rain

Support This Page