Yes

you do need a jacket based on the weather in Mitcham VIC 3132, Australia 1 second ago

Why? Because it's not very warm out.
56°F14°C & Clear

Wind is 3 mph5 km/h from the S, gusting to 9 mph15 km/h
March 28
8am56°F13°C3 mph5 km/h SClear
9am55°F13°C3 mph4 km/h SClear
10am54°F12°C2 mph3 km/h SEClear
11am53°F12°C2 mph3 km/h SEClear
12pm52°F11°C2 mph3 km/h EMostly Clear
1pm51°F10°C2 mph4 km/h NEMostly Clear
2pm50°F10°C3 mph4 km/h NMostly Clear
3pm49°F10°C3 mph4 km/h NEPartly Cloudy
4pm50°F10°C3 mph5 km/h NMostly Cloudy
5pm51°F10°C3 mph5 km/h NEPartly Cloudy
6pm54°F12°C3 mph4 km/h NMostly Clear
7pm60°F15°C2 mph3 km/h NClear
DateLowHighWindDayNight
March 2755°F13°C71°F21°C4 mph7 km/h from SMostly ClearMostly Clear
March 2849°F10°C83°F28°C3 mph5 km/h from NWClearMostly Clear
March 2953°F11°C80°F27°C4 mph6 km/h from SPartly CloudyMostly Clear
March 3053°F12°C83°F28°C3 mph5 km/h from SMostly ClearMostly Cloudy
March 3158°F15°C78°F26°C6 mph9 km/h from NCloudyRain
April 156°F13°C65°F19°C9 mph14 km/h from WRainRain
April 250°F10°C61°F16°C8 mph13 km/h from SMostly CloudyMostly Clear

Yes

Low of 49°F10°C, High of 83°F29°C
Wind: 3 mph5 km/h
Precipitation: None

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