The mountains in Shenandoah National Park are usually 10 degrees cooler than the valley below. Winters can be severe with snow and ice, and summer showers may be sudden. Layered clothing is always suggested.
Maine ocean islands provide the only nesting sites for Atlantic puffins in the United States. Eastern Egg Rock in the midcoast region, Seal Island and Matinicus Rock at the mouth of Penobscot Bay, and Machias Seal Island and Petit Manan Island off the downeast coast provide habitat for more than 4,000 puffins each summer.