Atmospheric conditions upon Longs Summit can be capricious. Conditions at the summit of Longs Peak can shift drastically. It is vital to check the weather forecast and be ready for any kind of climate conditions hiking on Longs Summit. The mountain is famous for its sudden weather shifts and hazardous weather events. Dressing in multiple layers and bringing spare gear like precipitation coats, hats, and mittens is essential to stay protected from the elements.