Climate on Longs Mountain is volatile. The weather atop Longs Summit can shift dramatically. It can be vital to check the weather forecast and be equipped for any climate conditions ascending Longs Summit. The mountain is renowned for its unexpected weather variations as well as dangerous storms. Wearing the right clothes in layers and carrying extra equipment like precipitation coats, caps, and mittens is crucial to be protected from inclement weather.

Longs Peak Keyhole Route US National Park Service