Yes

you do need a jacket based on the weather in Prahran VIC 3181, Australia 1 second ago

Why? Because it's cool enough your breath is visible, but your nose isn’t red yet!
42°F5°C & Mostly Clear

Wind is 6 mph9 km/h from the North, gusting to 11 mph17 km/h
July 23
6pm42°F6°C6 mph9 km/h NorthMostly Clear
7pm44°F7°C6 mph10 km/h NorthMostly Clear
8pm48°F9°C6 mph10 km/h NorthMostly Clear
9pm52°F11°C7 mph11 km/h NorthMostly Clear
10pm56°F13°C6 mph10 km/h NorthMostly Clear
11pm58°F14°C6 mph10 km/h NorthMostly Clear
July 24
12am60°F15°C7 mph11 km/h NorthwestMostly Clear
1am60°F15°C6 mph10 km/h NorthwestPartly Cloudy
2am59°F15°C6 mph10 km/h NorthwestMostly Cloudy
3am57°F14°C7 mph12 km/h NorthwestPartly Cloudy
4am55°F13°C8 mph12 km/h NorthPartly Cloudy
5am53°F12°C7 mph12 km/h NorthPartly Cloudy
DateLowHighWindDayNight
July 2341°F5°C60°F15°C6 mph10 km/h from NorthMostly ClearPartly Cloudy
July 2443°F6°C53°F12°C10 mph15 km/h from NortheastDrizzleDrizzle
July 2548°F9°C54°F12°C12 mph20 km/h from NorthDrizzleDrizzle
July 2646°F8°C56°F13°C8 mph13 km/h from NorthwestRainDrizzle
July 2747°F8°C56°F13°C12 mph19 km/h from WestRainDrizzle
July 2844°F7°C54°F12°C5 mph8 km/h from WestDrizzleDrizzle
July 2943°F6°C52°F11°C5 mph8 km/h from SouthwestDrizzleDrizzle

Yes

Low of 43°F6°C, High of 54°F12°C
Wind: 10 mph15 km/h
Precipitation: 43% rain

Support This Page