Summer is never warm, it’s just incredibly hot. Compare any summer day and today. You can’t wear anything you want during summer. Today, anybody could wear anything and nobody would be too cold or too hot (except in the subway and on the bus). Of course, the “wear anything” part has limits. During summer, if you’re not wearing anything short, you get all burnt up. Today, the temperature was ideal: close to 20oC.
Basically, I’m just saying that today, or this time of the year, is definitely in the top 5 days of the year.