Get Personal With Me: Warmer Weather

What constitutes "warm" or "cold" weather can be quite subjective and individualized.  What's your concept of "warm" weather?  Is there a particular temperature it has to reach before you go without a jacket?  Put on shorts?  Make Brad's day?  Make Matty's day?

Today's questions are brought to you by Colorful, who's wondering who forgot to remind Demeter that it was the first day of Spring.