Longs Peak Rocky Mountain National Park US National Park Atmospheric conditions on Longs Summit is volatile. Conditions atop Longs Summit may fluctuate greatly. It can be essential to check the forecast and be ready for any kind of weather conditions ascending Longs Peak. The peak is renowned for its abrupt climate variations and risky storms. Wearing the right clothes in multiple layers and bringing spare gear like precipitation coats, caps, and gloves is essential to be safe from inclement weather.