June begins the beautiful summer season in Michigan with bright sunshine amid blue skies at the helm. The long days see 8 hours of sunlight and the rainfall averages 3" (76mm) to 5" (127mm) in the month. The average high temperatures are in the pleasant range of 67°F (19.4°C) to 80°F (26.7°C), while the nights are comfortable between the 45°F (7.2°C) to 58°F (14.4°C) range. Temperatures reach 90°F (32.2°C) in the southeast but rarely stay high for long. The conditions are ideal for boating and fishing in the vast number of lakes. Summer is the chance to visit the state and national parks of Mackinac Island and Isle Royale. The pristine sunshine offers ample time to paddle on the waterways or relax on a boat on one of the many lakes. Thunderstorms are occasional and bring the majority of the summer rainfall. Carry a rain jacket in the vicinity of the lakes. Do not waste a single blissful day in June in Michigan.