At 3:40 AM this morning, Tuesday September 24, the temperature at the NJ Weather and Climate Network (NJWxNet) SafetyNet station in Walpack (Sussex County) fell to 32°. This marks the first freezing observation of the fall season at a New Jersey location. With dense cold air draining from the surrounding hillsides, this northwest valley location is commonly amongst the coldest locations in the 56-station NJWxNet constellation. The Walpack temperature vacillated between a minimum of 31° and 32° the rest of the night until climbing to 33° at 6:45. Walpack had previously fallen to a summer minimum of 33° this month on September 17th and 18th.
Other chilly locations this morning include Pequest (Warren) 33°, Basking Ridge (Somerset) 35°, and nine other NJWxNet stations between 37°-39°. Meanwhile, coastal stations at Harvey Cedars (Ocean) and West Cape May (Cape May) were the mildest locations at 49°.