It will be warm.
Just an interesting factoid…
Chicago is call the “Windy City” not because it is windy but because of its politics.
During the 1889-1890 bidding for the World's Fair of 1893, Chicago advocates put on a rather long-winded presentation and campaign to win approval. The choice narrowed down to Chicago, New York, Washington and St Louis, and the competition before Congress among these cities was fierce and at times ugly. (The world's fair of 1993, known as the Columbian Exposition, was intended to celebrate the 400th anniversary of Christopher Columbus's landing in America, but was actually held in 1893, a year later than had been planned.)
During the campaign, The New York Sun editor Charles Dana wrote in reference to Chicago's lobbying tactics: "Don't pay attention to the nonsensical claims of that windy city. Its people could not build a world's fair even if they won it." This editorial has been widely credited with popularizing the Windy City nickname.