Because of its location in the higher elevations of northwestern New Jersey's Appalachian mountains, Newton, as well as the rest of Sussex County, has a cooler humid continental climate or microthermal climate (Köppen climate classification Dfb) which indicates patterns of significant precipitation in all seasons and at least four months where the average temperature rises above 10 °C The determination of Dfb (warm summer subtype) region is from Peel, M. C., Finlayson, B. L., and McMahon, T. A. (University of Melbourne). [