Yes

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

Why? Because it's pretty chilly!
51°F11°C & Mostly Cloudy

Wind is 6 mph9 km/h from the Southeast, gusting to 14 mph22 km/h
September 9
4am50°F10°C6 mph10 km/h SoutheastMostly Clear
5am49°F9°C5 mph8 km/h SoutheastMostly Clear
6am48°F9°C5 mph9 km/h SoutheastMostly Cloudy
7am48°F9°C5 mph8 km/h SoutheastMostly Cloudy
8am48°F9°C6 mph9 km/h SoutheastCloudy
9am53°F12°C6 mph9 km/h SoutheastCloudy
10am59°F15°C6 mph10 km/h SoutheastCloudy
11am65°F18°C7 mph11 km/h SouthCloudy
12pm69°F20°C7 mph11 km/h SouthCloudy
1pm72°F22°C7 mph12 km/h SouthCloudy
2pm73°F23°C7 mph12 km/h SouthMostly Cloudy
3pm74°F24°C7 mph11 km/h SouthMostly Cloudy
DateLowHighWindDayNight
September 948°F9°C76°F24°C6 mph10 km/h from SouthMostly CloudyMostly Clear
September 1053°F12°C81°F27°C4 mph7 km/h from SouthPartly CloudyMostly Clear
September 1157°F14°C82°F28°C5 mph8 km/h from EastMostly ClearMostly Clear
September 1259°F15°C86°F30°C7 mph11 km/h from SouthMostly ClearPartly Cloudy
September 1364°F18°C88°F31°C9 mph14 km/h from SouthwestMostly CloudyMostly Cloudy
September 1466°F19°C89°F32°C6 mph10 km/h from WestPartly CloudyPartly Cloudy
September 1568°F20°C90°F32°C7 mph11 km/h from EastPartly CloudyPartly Cloudy

Yes

Low of 53°F12°C, High of 81°F27°C
Wind: 4 mph7 km/h
Precipitation: None

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