No, it doesn’t.
First, Chicago is but one observing station, and last winter was but one season, what matters is what happens on a global scale, over time. As Robert Heinlein once quipped “Climate is what you expect, weather is what you get.” You’ll always have deviations from norms, that’s what weather is all about. What matters is the general trend of those deviations.
Second, as cold as last winter was in the Midwest, just in the USA alone the extremes of warmth were more profound: