A mostly clear night with calming winds will set the stage for the first potential frost of the season for many Central PA neighborhoods overnight. Temperatures will quickly drop through the 40s by midnight, with an average low of 36 by early Monday morning. Locations north of Harrisburg can expect a widespread frost, ending the growing season. The frost potential will be more patchy from Harrisburg south.
Monday will bring mostly sunny skies to the region, along with less windy conditions. Temperatures will bounce back a bit, leading a mild afternoon with highs in the mid 60s. There is a slim chance for some showers on Tuesday, and maybe another chance for a little rain by Wednesday morning, but neither offer any strong likelihood.
By the middle and the end of the workweek, the cooler air moving in from the northwest will keep our temperatures in the lower 50s at best, with some spots struggling to even get out of the upper 40s.
The second half of October certainly looks to make up for the balmy first half for Central PA.