Welcome to the "Grumpy Factor". We've been feeling it for over a week here on the east coast of the US, and in Baltimore in particular:
A common theory holds that hot weather is more tolerable than cold. This fails to account for something meteorologists never refer to.
Call it the Grumpy Factor, a phenomenon tied to humidity. In a nursery-rhyme-science sort of a way, the Grumpy Factor explains how unpleasantness can shuffle across the city, lighting tempers and darkening moods.
The heat index has been at 100+ for the last 6 days, and instead of having a bad hair day, I'm having a bad hair month.