Atmospheric conditions upon Longs Summit can be inconstant. Conditions at the summit of Longs Peak may change greatly. It's essential to monitor the forecast and be prepared for any kind of weather conditions hiking on Longs Summit. The mountain is known for its sudden climate variations and hazardous storms. Choosing the suitable attire in layers and bringing spare gear like rain jackets, caps, and mittens is essential to be sheltered against inclement weather.