Voyageurs is a maze of interconnected water highways, and visitors to this water-based park should plan ahead by bringing their own watercraft, reserving a watercraft, or taking a park ranger boat tour. Voyageur country has four distinct seasons. The air is temperate during June, July, and August, when periods of fine, mild weather prevail. The frost-free season averages 120 days from June to mid-September. The average ice-out date is May 3, but it varies from year to year. Annual precipitation of rain and snow averages 25-28 inches in the park, and snowfall ranges from 55-70 inches, but is highly variable. The first measurable snowfall occurs in late October and the last in late April or early May.