Il y a 2 jours · Mackinaw City Extended Forecast with high and low temperatures °F Oct 8 – Oct 14 Lo:40 Thu, 12 Hi:54 3 0.08 Lo:42 Fri, 13 Hi:54 11 0.05 Lo:45 Sat, 14 Hi:51 11 Oct 15 – Oct 21 0.04 Lo:45 Sun, 15 Hi:51 13 Lo:40 Mon, 16 Hi:51 10 Lo:38. Find the most current and reliable 14 day weather forecasts, storm alerts, reports and information for Mackinaw City, MI, US with The Weather Network. Mackinaw City, MI Weather Forecast | AccuWeather Current Weather 9:14 AM 48° F RealFeel® 45° RealFeel Shade™ 45° Air Quality Excellent Wind W 7 mph Wind Gusts 10 mph Mostly cloudy More.