Yes

you do need a jacket based on the weather in Chicago, IL 60606, USA 1 second ago

Why? Because a jacket will keep you cozy, but you won't break a seat!
59°F15°C & Mostly Clear

Wind is 5 mph8 km/h from the South, gusting to 13 mph21 km/h
September 10
8am59°F15°C6 mph9 km/h SouthMostly Clear
9am62°F16°C6 mph9 km/h SouthMostly Clear
10am65°F18°C5 mph8 km/h SouthMostly Clear
11am69°F21°C5 mph8 km/h SouthwestMostly Clear
12pm73°F23°C4 mph6 km/h SouthMostly Clear
1pm75°F24°C5 mph8 km/h SoutheastMostly Clear
2pm76°F25°C4 mph7 km/h SoutheastPartly Cloudy
3pm77°F25°C4 mph7 km/h EastPartly Cloudy
4pm78°F25°C5 mph7 km/h EastPartly Cloudy
5pm77°F25°C5 mph7 km/h EastPartly Cloudy
6pm77°F25°C5 mph8 km/h EastPartly Cloudy
7pm75°F24°C5 mph8 km/h EastPartly Cloudy
DateLowHighWindDayNight
September 1059°F15°C78°F25°C5 mph8 km/h from SoutheastMostly ClearPartly Cloudy
September 1163°F17°C78°F25°C6 mph9 km/h from NortheastMostly ClearMostly Clear
September 1262°F17°C82°F28°C4 mph7 km/h from SoutheastMostly ClearMostly Cloudy
September 1367°F19°C86°F30°C7 mph12 km/h from SouthwestMostly CloudyPartly Cloudy
September 1468°F20°C79°F26°C7 mph11 km/h from NortheastClearClear
September 1565°F19°C78°F26°C6 mph10 km/h from EastMostly ClearPartly Cloudy
September 1664°F18°C79°F26°C5 mph8 km/h from SoutheastPartly CloudyPartly Cloudy

No

Low of 63°F17°C, High of 78°F26°C
Wind: 6 mph9 km/h
Precipitation: None

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