Manchester, New Hampshire – New Hampshire is bracing for an extended stretch of Arctic cold that will settle in from late January and likely persist into early February, with subzero nights becoming increasingly common across much of the Granite State. From the Merrimack Valley to the rugged peaks of the White Mountains, temperatures are expected to remain locked well below normal, creating heightened risks for residents, infrastructure, and travelers.
According to the National Weather Service Climate Prediction Center, temperature outlooks from late January through mid-February strongly favor below-normal conditions across New England, including all of New Hampshire. The 6–10 day, 8–14 day, and longer-range outlooks consistently show Arctic air holding firm into early February, with no sustained warmup signal before Valentine’s Day.
In Manchester and Nashua, daytime highs may occasionally reach the teens, but overnight lows are expected to fall into the single digits or below zero during the coldest stretches. Concord and the Upper Valley, including Lebanon and Hanover, will likely experience colder nighttime conditions, especially during clear, calm periods. In the North Country and White Mountains, including Littleton, Berlin, and Mount Washington, temperatures may remain below zero for extended periods, with extreme wind chills creating dangerous exposure conditions along Route 16, I-93 through Franconia Notch, and higher elevations.
The prolonged cold increases the risk of frostbite and hypothermia in minutes when wind is present. Residents are urged to limit time outdoors, dress in insulated layers, protect exposed plumbing, and ensure vehicles are winter-ready. Pets should be kept indoors, and emergency kits are recommended for anyone traveling through rural or mountainous areas.
While brief moderation is possible at times, long-range signals suggest New Hampshire’s Arctic cold may not fully ease until after Valentine’s Day. Additional cold weather advisories or warnings remain possible as this deep winter pattern continues.
