Yes

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

Why? Because the cold's there, but it's just a reminder, not an invasion and it's so windy, your hat will probably launch into orbit!
35°F2°C & Windy

Wind is 15 mph24 km/h from the North, gusting to 30 mph48 km/h
November 9
10am35°F2°C15 mph24 km/h NorthDrizzle
11am34°F1°C15 mph25 km/h NorthSnow
12pm34°F1°C16 mph25 km/h NorthWindy
1pm33°F1°C16 mph26 km/h NorthWindy
2pm34°F1°C16 mph25 km/h NorthWindy
3pm34°F1°C17 mph27 km/h NorthWindy
4pm35°F2°C18 mph29 km/h NorthWindy
5pm36°F2°C18 mph30 km/h NorthwestWindy
6pm36°F2°C18 mph29 km/h NorthwestWindy
7pm36°F2°C18 mph28 km/h NorthwestWindy
8pm36°F2°C18 mph28 km/h NorthwestWindy
9pm35°F2°C17 mph28 km/h NorthwestWindy
DateLowHighWindDayNight
November 927°F-3°C38°F4°C17 mph27 km/h from NorthwestWindySnow
November 1025°F-4°C37°F3°C14 mph22 km/h from NorthwestMostly ClearMostly Cloudy
November 1126°F-3°C43°F6°C13 mph22 km/h from SouthwestMostly CloudyMostly Clear
November 1237°F3°C52°F11°C14 mph22 km/h from WestMostly ClearPartly Cloudy
November 1333°F1°C53°F12°C7 mph11 km/h from SouthwestMostly CloudyMostly Cloudy
November 1440°F5°C56°F13°C8 mph13 km/h from EastPartly CloudyCloudy
November 1544°F7°C61°F16°C12 mph19 km/h from SoutheastCloudyMostly Cloudy

Yes

Low of 25°F-4°C, High of 37°F3°C
Wind: 14 mph22 km/h
Precipitation: None

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