Yes

you do need a jacket based on the weather in Detroit (Downtown), Michigan, United States 1 second ago

Why? Because too cold for just a hoodie, too warm for a parka!
49°F10°C & Clear

Wind is 6 mph9 km/h from the North, gusting to 14 mph23 km/h
October 16
4am49°F9°C6 mph9 km/h NorthClear
5am47°F9°C5 mph8 km/h NorthClear
6am46°F8°C5 mph8 km/h NorthClear
7am45°F7°C5 mph8 km/h NorthClear
8am44°F7°C5 mph7 km/h NorthClear
9am43°F6°C4 mph7 km/h NorthClear
10am42°F6°C4 mph6 km/h NorthClear
11am43°F6°C3 mph5 km/h NorthClear
12pm43°F6°C3 mph5 km/h NorthClear
1pm46°F8°C3 mph5 km/h NorthClear
2pm50°F10°C3 mph5 km/h NorthClear
3pm54°F12°C3 mph5 km/h NorthClear
DateLowHighWindDayNight
October 1549°F9°C63°F17°C4 mph7 km/h from NorthMostly CloudyClear
October 1642°F6°C64°F18°C3 mph5 km/h from NortheastClearMostly Clear
October 1748°F9°C65°F18°C7 mph11 km/h from SouthMostly CloudyMostly Cloudy
October 1856°F14°C74°F23°C10 mph16 km/h from SouthRainRain
October 1950°F10°C64°F18°C18 mph29 km/h from SouthwestRainDrizzle
October 2046°F8°C61°F16°C10 mph17 km/h from WestClearMostly Clear
October 2147°F8°C60°F16°C13 mph21 km/h from SouthwestRainDrizzle

Yes

Low of 43°F6°C, High of 64°F18°C
Wind: 3 mph5 km/h
Precipitation: None

Support This Page