On a daily and annual basis, Mount Desert Island temperatures are more moderate than those of inland Maine. The Maine coastal climate has been ranked second only to the Pacific Northwest in annual precipitation. This moisture occurs in every form at Acadia.
Ice storms are regular in winter and early spring, and rain is frequent in every month.
Fog is common during June, July and August. Spring can be foggy with temperatures ranging between 30 and 70 degrees. Blackflies are common in late May and June. Mosquitoes can also be bothersome. Wear light-colored clothing, long sleeve shirts and long pants for protection.