Yes

you do need a jacket based on the weather in South Bend, IN, USA 1 second ago

Why? Because the air feels like the cozy middle ground between summer and winter!
54°F12°C & Clear

Wind is 4 mph7 km/h from the Southeast, gusting to 9 mph14 km/h
September 12
5am54°F12°C4 mph7 km/h SoutheastClear
6am53°F12°C4 mph7 km/h SoutheastClear
7am53°F11°C4 mph7 km/h SoutheastClear
8am53°F12°C4 mph6 km/h EastClear
9am59°F15°C3 mph5 km/h SoutheastClear
10am66°F19°C5 mph7 km/h SoutheastClear
11am72°F22°C5 mph9 km/h SoutheastMostly Clear
12pm76°F24°C5 mph8 km/h SouthMostly Clear
1pm79°F26°C4 mph6 km/h SouthMostly Clear
2pm81°F27°C3 mph4 km/h SouthClear
3pm82°F28°C3 mph5 km/h SouthMostly Clear
4pm83°F28°C3 mph5 km/h SouthMostly Clear
DateLowHighWindDayNight
September 1253°F11°C83°F28°C4 mph6 km/h from SoutheastMostly ClearPartly Cloudy
September 1358°F15°C77°F25°C5 mph8 km/h from SouthCloudyPartly Cloudy
September 1463°F17°C85°F30°C6 mph9 km/h from SoutheastMostly ClearClear
September 1562°F16°C87°F30°C6 mph10 km/h from EastMostly ClearMostly Clear
September 1659°F15°C85°F30°C6 mph9 km/h from EastMostly ClearPartly Cloudy
September 1759°F15°C85°F29°C4 mph7 km/h from SoutheastMostly ClearMostly Clear
September 1862°F17°C84°F29°C5 mph8 km/h from SouthwestPartly CloudyPartly Cloudy

Yes

Low of 58°F15°C, High of 78°F26°C
Wind: 5 mph8 km/h
Precipitation: 26% rain

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