I’m kind of a weather nerd and I think this is the only time I’ve ever seen us so close to a 40-degree differential in a single day (-38 degrees in about 12 hours). If you live at high altitudes and/or in the desert, 30+ degree differentials are not that uncommon. But it’s definitely surprising in a Gulf Coast climate. For comparison, winter and summer might be as little as 10 degrees, depending on humidity and cloud cover. 20 is more typical.
Today is one of those “Send your kids to school in a t-shirt, but put a parka in their backpack” types of days. If it weren’t for all the rain, trick or treating would be perfect weather.