Yes

you do need a jacket based on the weather in Marayong NSW 2148, Australia 1 second ago

Why? Because you're not freezing, but you’ll definitely start complaining if it lasts much longer!

47°F8°C & Clear

Wind is 2 mph3 km/h from the Southwest, gusting to 4 mph6 km/h

Date	Low	High	Wind	Day	Night
June 14	43°F6°C	66°F19°C	1 mph2 km/h from Northwest	Partly Cloudy	Mostly Clear
June 15	38°F4°C	62°F17°C	2 mph4 km/h from North	Clear	Mostly Clear
June 16	40°F5°C	65°F18°C	5 mph8 km/h from Northwest	Mostly Clear	Clear
June 17	37°F3°C	61°F16°C	2 mph3 km/h from Southwest	Mostly Clear	Clear
June 18	36°F2°C	63°F17°C	2 mph3 km/h from North	Mostly Cloudy	Partly Cloudy
June 19	41°F5°C	65°F18°C	1 mph2 km/h from South	Clear	Mostly Clear
June 20	40°F5°C	67°F20°C	2 mph3 km/h from North	Clear	Mostly Clear

Low of 38°F4°C, High of 63°F17°C
Wind: 2 mph4 km/h
Precipitation: None