Temperatures could drop to near freezing Thursday night in the Lehigh Valley, marking the first such occurrence this autumn.
The region will be under a freeze watch 10 p.m. Thursday to 9 a.m. Friday, meaning frost and freeze conditions could kill crops and other sensitive vegetation, and damage outdoor plumbing, according to forecasters.
Widespread frost is likely while a low of 34 is expected Thursday night, according to the National Weather Service in Mount Holly, New Jersey. The last time it was that cold in the region was in April.
Neighboring Monroe and Carbon counties are included in the watch area as well.
☔️➡️🌤️ Showers this morning will give way to clearing skies, breezy, cooler, and drier conditions during the afternoon and into tonight. Lows tonight will be mainly in the 40s, upper 30s in the higher elevations north, and near 50° at the coast. #PAwx #NJwx #DEwx #MDwx pic.twitter.com/CBaSOqAK2r
— NWS Mount Holly (@NWS_MountHolly) October 8, 2025
A cold front is expected to drop temperatures this week. Highs should be in the 60s through the weekend.
Meteorologists with the local weather service office wrote Wednesday in their daily forecast discussion that they are monitoring the possibility of a coastal storm affecting the region Sunday. They noted there is a lot of uncertainty with the forecast, and there are a wide range of outcomes.
Any rain would likely come Sunday afternoon, forecasters said.
Here is the extended forecast from the National Weather Service:
Thursday: Sunny, with a high near 61. North wind 5-10 mph.
Friday: Widespread frost, mainly before 8 a.m. Otherwise, sunny, with a high near 65. Calm wind becoming south around 5 mph in the afternoon.
Saturday: Mostly sunny, with a high near 69.
Sunday: A chance of showers after 2 p.m. Partly sunny, with a high near 64. Chance of precipitation is 30%.
Monday: Partly sunny, with a high near 65.
Tuesday: Mostly sunny, with a high near 69.
