Climbing Longs Peak Weather upon Longs Mountain may be changeable. Conditions atop Longs Peak could vary dramatically. It is essential to check the weather forecast and be equipped for any kind of weather conditions before Longs Mountain. The peak is recognized for its unexpected climate variations as well as risky storms. Wearing the right clothes in multiple layers and bringing extra equipment like precipitation jackets, caps, and gloves is crucial to stay sheltered against the elements.