Yes

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

Why? Because it's bitterly cold.
49°F9°C & Clear

Wind is 9 mph14 km/h from the W, gusting to 16 mph26 km/h
March 28
7pm49°F9°C9 mph14 km/h WClear
8pm47°F8°C7 mph11 km/h WClear
9pm44°F7°C6 mph9 km/h NWClear
10pm42°F5°C5 mph8 km/h NWMostly Clear
11pm40°F4°C5 mph8 km/h NWMostly Clear
March 29
12am39°F4°C5 mph8 km/h NMostly Clear
1am37°F3°C4 mph7 km/h NClear
2am35°F2°C4 mph7 km/h NClear
3am34°F1°C4 mph7 km/h NClear
4am33°F0°C5 mph7 km/h NClear
5am32°F-0°C5 mph8 km/h NClear
6am33°F0°C5 mph7 km/h NMostly Clear
DateLowHighWindDayNight
March 2829°F-2°C50°F10°C7 mph11 km/h from WMostly ClearMostly Clear
March 2932°F-0°C50°F10°C7 mph11 km/h from EPartly CloudyRain
March 3042°F6°C57°F14°C9 mph14 km/h from NWMostly CloudyMostly Cloudy
March 3139°F4°C47°F8°C9 mph14 km/h from EDrizzleRain
April 141°F5°C47°F8°C11 mph18 km/h from NERainRain
April 239°F4°C45°F7°C15 mph23 km/h from NDrizzleMostly Cloudy
April 334°F1°C48°F9°C14 mph22 km/h from NMostly CloudyMostly Clear

Yes

Low of 32°F-0°C, High of 50°F10°C
Wind: 7 mph11 km/h
Precipitation: None

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