New Hampshire Weather & Climate Guide 2026

New Hampshire offers a remarkable concentration of natural beauty and historical depth in a compact New England state. From the towering White Mountains and the iconic summit of Mount Washington to the serene shores of Lake Winnipesaukee and the pristine Atlantic coastline at Hampton Beach, visitors encounter dramatic landscapes at every turn. Portsmouth anchors the seacoast with its beautifully preserved colonial architecture and a thriving culinary scene, while the Lakes Region provides summer watersports and leisurely cruises. Fall foliage transforms the state into a mosaic of crimson and gold each October, drawing leaf-peepers from across the Northeast. The state's 'Live Free or Die' ethos permeates everything from its lack of sales and income taxes to its independent political culture.

New Hampshire has a humid continental climate with four distinct seasons. Summers are warm to hot (70–85°F / 21–29°C in valleys) with occasional humidity. Fall is the state's signature season — brilliant foliage typically peaks mid-September in the North Country and progresses south through mid-October. Winters are cold and snowy, especially in the White Mountains where annual snowfall exceeds 200 inches at higher elevations. Ski season runs December through March. Spring is short and features 'mud season' (March–April) when unpaved roads soften. Mount Washington is a world apart: average summit temperature in July is 45°F (7°C), and winds exceed hurricane force (75+ mph) year-round on average. The summit holds the record for the world's highest surface wind speed at 231 mph (recorded 1934).