Know about the spring and autumn seasons for visiting the city of Chicago
The spring season as well as the autumn season in Chicago is extremely pleasant with the temperatures not too high nor too low. These two seasons offer a lot to the visitors with respect to the beauty and colors. So, you do not have to deal with windy conditions, thunderstorms or heavy rains during this time, and if at all, it would be a rare phenomenon.
So, this spring and autumn are pleasant times for visiting the city of Chicago as compared to summers and winters here. You get to witness the city at its beautiful and at nature's best. Though the weather is quite fluctuating and unpredictable during spring and fall as well. This inconsistency is the characteristic of the weather and climate here.
http://www.yelp.com/topic/chicago-best-month-to-visit-chicago
http://www.city-data.com/forum/chicago/72025-best-time-year-visit.html
