Yes

you do need a jacket based on the weather in Detroit, MI 48205, USA 1 second ago

Why? Because it's bitterly cold.
47°F9°C & Mostly Clear

Wind is 6 mph9 km/h from the NW, gusting to 14 mph23 km/h
September 8
3am47°F8°C6 mph10 km/h WClear
4am47°F8°C7 mph11 km/h WClear
5am45°F7°C7 mph11 km/h WClear
6am45°F7°C7 mph11 km/h WClear
7am45°F7°C7 mph11 km/h WClear
8am47°F8°C7 mph11 km/h WClear
9am51°F10°C7 mph11 km/h WClear
10am55°F13°C8 mph13 km/h WClear
11am60°F16°C9 mph14 km/h WClear
12pm64°F18°C10 mph17 km/h WClear
1pm67°F19°C11 mph18 km/h WClear
2pm69°F20°C11 mph18 km/h WMostly Clear
DateLowHighWindDayNight
September 845°F7°C71°F22°C10 mph16 km/h from WMostly ClearMostly Clear
September 956°F13°C79°F26°C12 mph19 km/h from WMostly ClearMostly Clear
September 1059°F15°C82°F28°C4 mph7 km/h from SWMostly ClearMostly Clear
September 1161°F16°C83°F29°C5 mph7 km/h from SClearClear
September 1261°F16°C85°F30°C5 mph7 km/h from EClearPartly Cloudy
September 1365°F19°C81°F27°C8 mph12 km/h from EMostly CloudyMostly Cloudy
September 1464°F18°C75°F24°C10 mph16 km/h from EMostly CloudyPartly Cloudy

Yes

Low of 55°F13°C, High of 80°F27°C
Wind: 12 mph19 km/h
Precipitation: 7% rain

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