14 Day Weather FoursSaintLaurent meteoblueClimate on Longs Peak may be inconstant. Conditions at the summit of Longs Summit might vary greatly. It's vital to check the weather forecast and be ready for any climate conditions ascending Longs Mountain. The is known for its unexpected weather variations and risky storms. Wearing the right clothes in layers and carrying extra equipment like precipitation jackets, hats, and gloves is essential to stay protected from the elements.