Halloween trick-or-treat forecast: Rain for some, clear skies for many

Halloween is almost here, so you finally get an answer to the question “do I need to last-minute add a waterproof layer to my costume?” While almost all of the country is going to be warmer than usual temperature-wise, rain could cause some problems for the Mississippi Valley, Gulf Coast, Southwest and Rocky Mountains. Here’s what you need to know ahead of All Hallows’ Eve.