Lachen is situated at higher region in Sikkim as it enjoys an Alpine climate. The winters are very cold while the weather remains pleasant during the summer months. The best time to visit Lachen is from October to June. However, winter is the best time for honeymoon couples. If you plan to visit Lachen in winter you should be well equipped with heavy woolens. For those who are not fond of winters, summers are the best time to visit Lachen as the weather remains comfortable during the day. However, nights can be chilly during summers as well.