evidence: The summit of Everest experiences the coldest temperatures. In winter, summit temperatures can reach an unbearable -60°C (-76°F). Even in the climbing seasons, it can be as cold as -20°C (-4°F). [...] Winter (December to February) is Everest’s harshest season. With temperatures at the summit dropping to -60°C (-76°F) and powerful winds, climbing becomes nearly impossible. [...] A2: The summit of Mount Everest can reach temperatures as low as -60°C (-76°F) in winter and around -20°C (-4°F) during the climbing seasons.