Lambasinghi has lot of snow till February. Araku valley, Kumarakom, Coorg, Chikmagalur, Ooty and Kodai, Coonoor, kolli hills, Munnar, kudremukh are some winter spots of south india.
I would say the entire South of Vindhyas is great to visit during the winters. From the beaches of Gokarna, Pondicherry, Puri, Chandipur to the mountains of Munnar, Coorg, Ooty or even the cities of Bangalore, Chennai. Of course, God's own country looks breath-takingly beautiful in the winter.