Yes

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

Why? Because it's cool. Pleasantly cool, but cool and it's really really huffing out there!
50°F10°C & Windy

Wind is 18 mph29 km/h from the West, gusting to 34 mph55 km/h
June 6
12pm50°F10°C18 mph28 km/h WestWindy
1pm50°F10°C16 mph25 km/h WestWindy
2pm50°F10°C16 mph25 km/h WestWindy
3pm50°F10°C13 mph21 km/h WestCloudy
4pm51°F10°C12 mph20 km/h WestDrizzle
5pm51°F11°C12 mph20 km/h WestDrizzle
6pm52°F11°C12 mph20 km/h WestDrizzle
7pm53°F12°C14 mph22 km/h NorthwestDrizzle
8pm54°F12°C16 mph25 km/h NorthwestDrizzle
9pm54°F12°C17 mph28 km/h NorthwestRain
10pm55°F13°C21 mph34 km/h WestRain
11pm55°F13°C21 mph34 km/h WestRain
DateLowHighWindDayNight
June 647°F9°C57°F14°C18 mph29 km/h from WestRainDrizzle
June 746°F8°C52°F11°C10 mph16 km/h from SouthwestDrizzleDrizzle
June 846°F8°C55°F13°C6 mph10 km/h from SouthwestDrizzleDrizzle
June 946°F8°C57°F14°C5 mph8 km/h from SouthwestDrizzleDrizzle
June 1047°F9°C57°F14°C7 mph12 km/h from NorthDrizzleDrizzle
June 1149°F9°C59°F15°C7 mph12 km/h from SouthwestPartly CloudyMostly Clear
June 1247°F8°C60°F15°C5 mph7 km/h from NorthwestPartly CloudyPartly Cloudy

Yes

Low of 46°F8°C, High of 53°F12°C
Wind: 10 mph16 km/h
Precipitation: 48% rain

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