Weather for Longs Peak Colorado USA timeanddatecomClimate on Longs Summit is capricious. The weather on Longs Peak can fluctuate dramatically. It is essential to check the weather forecast and be equipped for any kind of weather conditions ascending Longs Peak. The is noted for its sudden climate variations as well as risky weather events. Wearing the right clothes in multiple layers and carrying spare gear like precipitation jackets, hats, and mittens is essential to be safe from the elements.