Yes

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

Why? Because it's so windy, your hat has officially retired from your head!
75°F24°C & Mostly Clear

Wind is 7 mph12 km/h from the Southwest, gusting to 20 mph32 km/h
October 31
2am75°F24°C8 mph13 km/h SouthwestMostly Clear
3am75°F24°C9 mph14 km/h SouthwestMostly Clear
4am74°F23°C9 mph15 km/h SouthwestMostly Clear
5am74°F23°C10 mph15 km/h SouthwestMostly Clear
6am73°F23°C10 mph16 km/h SouthwestMostly Clear
7am72°F22°C10 mph16 km/h SouthwestClear
8am70°F21°C8 mph13 km/h SouthClear
9am67°F19°C8 mph13 km/h SouthClear
10am63°F17°C6 mph10 km/h SouthClear
11am61°F16°C6 mph9 km/h SoutheastClear
12pm59°F15°C5 mph8 km/h SoutheastClear
1pm58°F14°C4 mph6 km/h SoutheastClear
DateLowHighWindDayNight
October 3057°F14°C75°F24°C7 mph11 km/h from SouthwestMostly ClearClear
October 3152°F11°C81°F27°C4 mph6 km/h from NorthClearPartly Cloudy
November 154°F12°C72°F22°C10 mph17 km/h from WestRainRain
November 249°F10°C57°F14°C8 mph13 km/h from SouthwestRainPartly Cloudy
November 349°F9°C56°F13°C13 mph21 km/h from SouthwestRainRain
November 450°F10°C61°F16°C9 mph14 km/h from SouthwestMostly CloudyMostly Cloudy
November 549°F10°C65°F19°C7 mph12 km/h from NorthMostly CloudyDrizzle

Yes

Low of 52°F11°C, High of 81°F27°C
Wind: 4 mph6 km/h
Precipitation: None

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