Yes

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

Why? Because it's so windy, your hat will probably launch into orbit!
82°F28°C & Windy

Wind is 19 mph30 km/h from the South, gusting to 30 mph48 km/h
June 3
8pm81°F27°C19 mph30 km/h SouthWindy
9pm78°F25°C16 mph27 km/h SouthWindy
10pm75°F24°C16 mph25 km/h SouthWindy
11pm74°F23°C15 mph24 km/h SouthCloudy
June 4
12am73°F23°C15 mph24 km/h SouthCloudy
1am72°F22°C16 mph26 km/h SouthWindy
2am71°F22°C15 mph25 km/h SouthWindy
3am71°F22°C14 mph22 km/h SouthMostly Cloudy
4am70°F21°C14 mph23 km/h SouthCloudy
5am70°F21°C14 mph23 km/h SouthwestCloudy
6am69°F21°C13 mph21 km/h SouthwestCloudy
7am69°F21°C12 mph20 km/h SouthwestCloudy
DateLowHighWindDayNight
June 365°F18°C87°F31°C17 mph28 km/h from SouthWindyDrizzle
June 463°F17°C76°F25°C11 mph18 km/h from SouthwestRainRain
June 560°F16°C76°F25°C8 mph12 km/h from NortheastDrizzleDrizzle
June 662°F16°C77°F25°C5 mph8 km/h from NortheastDrizzleDrizzle
June 760°F16°C76°F24°C8 mph13 km/h from NorthwestDrizzleMostly Clear
June 859°F15°C81°F27°C10 mph17 km/h from SouthwestPartly CloudyDrizzle
June 960°F16°C74°F23°C10 mph16 km/h from WestDrizzleMostly Clear

No

Low of 64°F18°C, High of 76°F25°C
Wind: 11 mph18 km/h
Precipitation: 79% rain

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