The months of April to June . Summers here are cool . Also, summers are ideal for trekking and mountaineering expeditions.
The monsoon is during July to September. Pelling receives good amount of rainfall in these months,as this place receives ample rainfall and prone to landslides.
The winter is during November to February. December to February is ideal months to enjoy snowfall. However, trekking is not advisable during these months But the views are breathtaking at the same time.