What you usually wear in Chicago during April ?

[Kerguelen]

Never been to Chicago, but looking at their data, I'd say jeans and a jacket.

[Neptunepenguins]

T-shirt and jeans early. Perhaps shorts if I go out in the afternoon on an average day. Might break out a light jacket at the coldest, and I would certainly wear light clothes on a colder than average day. Chicago that month looks like Houston at this time of year. A tad colder than Houston though.