Yes

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

Why? Because a jacket will keep you cozy, but you won't break a seat!
58°F15°C & Clear

Wind is 2 mph4 km/h from the East, gusting to 5 mph8 km/h
September 18
7am58°F14°C3 mph5 km/h EastClear
8am57°F14°C3 mph5 km/h SoutheastClear
9am62°F16°C3 mph5 km/h SoutheastClear
10am70°F21°C4 mph6 km/h SoutheastClear
11am77°F25°C3 mph5 km/h SouthClear
12pm82°F28°C4 mph6 km/h SouthClear
1pm85°F29°C3 mph5 km/h SouthClear
2pm88°F31°C3 mph4 km/h SouthClear
3pm89°F32°C2 mph3 km/h SouthClear
4pm90°F32°C2 mph3 km/h SoutheastClear
5pm90°F32°C2 mph4 km/h EastMostly Clear
6pm89°F32°C3 mph5 km/h EastMostly Clear
DateLowHighWindDayNight
September 1857°F14°C90°F32°C3 mph5 km/h from SoutheastClearPartly Cloudy
September 1965°F18°C84°F29°C4 mph7 km/h from SouthwestCloudyThunderstorms
September 2062°F17°C83°F28°C4 mph6 km/h from SouthMostly ClearMostly Cloudy
September 2165°F18°C80°F27°C7 mph12 km/h from SouthwestRainThunderstorms
September 2265°F18°C80°F27°C8 mph13 km/h from SouthwestDrizzleDrizzle
September 2365°F18°C77°F25°C8 mph12 km/h from SouthThunderstormsThunderstorms
September 2464°F18°C72°F22°C9 mph14 km/h from NortheastDrizzleDrizzle

No

Low of 64°F18°C, High of 84°F29°C
Wind: 4 mph7 km/h
Precipitation: 43% rain

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