The climate of Darjeeling Himalaya in West Bengal is as diverse as its relief. Here the higher one goes, the cooler one feels. It is often sultry hot dawn valleys and chilly cold on the ridges at the same time. When one side ridge is sick of rain the other side is smiling with cool sunshine.
Clouds grip, rather swallow, Darjeeling during the rains, and the Jalpaiguri foothills the rainy season lasts from late March to November. While annual rainfall at Kurseong is 400 cm. It is only 225 cm. at Kalimpong. Thunder storms occur in summer and October. July is the wettest and January the coldest month. The lowest temperature recorded was -5°C (23°F.) 1905.