It's 21°C at Inner Drive Technology WHQ and 22°C at O'Hare right now. In addition to being the normal high temperature for May 20th, that reading at O'Hare is the warmest since 11pm on October 30th. The forecast for O'Hare predicts a high near 26°C, which is normal for June 10th.
Which is all a long way of saying: I'm about to change into a polo shirt, take Cassie for a walk, and open every window in my house—not necessarily in that order.
By the way, the eclipse last night was really cool. I only wish I could have fallen back asleep more quickly after getting up to view it.