The Pine Barrens of New Jersey are in the transition zone between humid subtropical and humid continental climates. The Pine Barrens, however, have a microclimate that allows for a shorter frost-free season, and colder nighttime temperatures compared to most of New Jersey. Because of sandy soil and very little development, clear and calm nights can get much colder in the Pine Barrens than in the surrounding areas. On an average night, a difference is commonly seen, but the change can be as much as .
