Reduced productivity plus sleep deprivation. Gah. I want air conditioning already. It really is hard to work when you're sweating like a pig.
I have this love/hate relationship with spring, between the fact that the landlords almost always switch to air at least one week, often two, AFTER I need it and my allergy to cherry blossoms (planted on every block).
Spring used to be my favorite season. These days, its most definitely Fall.