The most popular time to visit the White Mountains is from Memorial Day to mid-October when temperatures are mild and the attractions are open. Summer (mid-June to Labor Day) is especially popular as more families can travel during the school vacation.
Foliage Season: Early September tends to be a quieter time, while later September to mid-October is foliage time, when the spectacular blaze of fall color is at its height. Fall foliage is often the busiest time of the year, so reservations are always recommended. ( For a free copy of "The Leaf Peepers' Guide: Autumn in New Hampshire's White Mountains," write: White Mountains Attractions, Box 10, North Woodstock, NH 03262 )
Winter in the White Mountains is especially popular with skiers and snowmobilers: there are ten major downhill ski mountains, over a dozen touring centers and a statewide snowmobile trail network. Spring is brief, with warm days and cool nights, making for excellent sightseeing.
The temperatures in the summer generally range from 70's to mid-80's, in the daytime; nights are cooler, so a sweater or light jacket is generally needed. During spring and autumn, days generally range from 50's to 70's and nights from 30's to 50's.
Shopping in New Hampshire is tax-free. Retail centers featuring everything from New Hampshire-made crafts to designer fashions are found throughout the region.