Mountaineering Expedition season in Sikkim starts from September to November and March to June. when daytime temperatures at most altitudes are comfortable. However, the temperatures of the southern part of the Himalaya are somewhat hot. Above 4,000m in the mornings and evenings the temperature will be considerably lower and can drop to -20 Degrees Celsius. Usually daytime temperatures are pleasant but nights are very cold above 5,000m. Temperatures are milder in spring but there can be more snow around. Late April , June through last week of sep. to first week of Dec. is the safest and best time for climbing and mountaineering as well as trekking too.
Sangay sherpa himself with experience of working in Himalayan mountaineering institute, Sikkim mountaineering association and many other organisation as instructor and guide looks after mountaineering Expedition, Sangay was also call my Indian army for rescue help in Lachung Sikkim after two Indian soldiers were caught in avalanche
The Sikkim government has recently opened the Five Expedition peaks surrounding Mt Kanchenjunga. The expedition Mt. Tenzing khang offers a challenging opportunity to climb one of them. The hard work of climbing a 6010 m high mountain is rewarded with the most stunning views over the Kanchenjunga range. The professional guides and porter teams are well-trained to support the expedition participant. Two base camps and rest days give the possibility for acclimatisation in the height. Nevertheless physical fitness and experience in high-altitude mountain climbing is required.