October temperatures in Philadelphia are going to finish above normal, and the recent warmth may have something do with the fact that so many leaves are still green out there, but the month is about to take a blue turn.
By Thursday morning, temperatures are forecast to drop below 40 in Philadelphia for the first time in six months as a chill spreads across the East.
In Boston, the wind chills will be in the 30s for Game 1 of the World Series at Fenway. (At Citizens Bank Park, they will be near 40, not that it will matter.)
The official forecast lows for Philadelphia International Airport for the Thursday, Friday, and Saturday mornings are in the 30s, and the National Weather Service says a"widspread frost or freeze" is possible Friday and Saturday mornings outside the city.