Yes

you do need a jacket based on the weather in Adelaide SA, Australia 1 second ago

Why? Because rain: where every drop seems to aim directly at your glasses and just cool enough for a jacket, but not warm enough to ditch it!
54°F12°C & Rain

Wind is 8 mph13 km/h from the Northwest, gusting to 17 mph28 km/h
September 15
1pm53°F12°C8 mph13 km/h NorthwestRain
2pm53°F12°C9 mph14 km/h NorthwestRain
3pm53°F12°C9 mph14 km/h NorthwestPartly Cloudy
4pm52°F11°C9 mph14 km/h NorthwestPartly Cloudy
5pm52°F11°C9 mph14 km/h NorthwestPartly Cloudy
6pm53°F12°C10 mph16 km/h NorthwestPartly Cloudy
7pm55°F13°C12 mph19 km/h NorthwestPartly Cloudy
8pm57°F14°C13 mph21 km/h NorthwestPartly Cloudy
9pm58°F15°C13 mph20 km/h NorthwestMostly Cloudy
10pm60°F15°C14 mph23 km/h WestPartly Cloudy
11pm60°F16°C14 mph22 km/h WestPartly Cloudy
September 16
12am61°F16°C14 mph22 km/h WestMostly Clear
DateLowHighWindDayNight
September 1551°F10°C61°F16°C13 mph21 km/h from WestRainPartly Cloudy
September 1648°F9°C60°F16°C6 mph9 km/h from WestMostly ClearClear
September 1747°F8°C72°F22°C9 mph15 km/h from NorthMostly ClearMostly Clear
September 1848°F9°C61°F16°C16 mph26 km/h from WestWindyDrizzle
September 1947°F8°C58°F14°C12 mph19 km/h from WestMostly CloudyDrizzle
September 2050°F10°C61°F16°C8 mph13 km/h from WestPartly CloudyMostly Cloudy
September 2148°F9°C62°F16°C7 mph12 km/h from SouthwestPartly CloudyMostly Clear

Yes

Low of 48°F9°C, High of 60°F16°C
Wind: 6 mph9 km/h
Precipitation: 5% rain

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