3rd link on a Google search for "Pondicherry weather"
The climatic condition of Pondicherry varies greatly due to variation in altitude and proximity towards Himalayan ranges. There are two distinct climatic regions: the predominant hilly terrain and the small plain region. The climatic condition of the plains is very similar to its counterpart in the Gangetic plain, i.e tropical. Summers are relatively hot and winters are chilly with temperatures going below 0°C. The lowest temperature recorded is -3.0°C at Mukteshwar and highest is 43.2°C at Pantnagar.Amused...perhaps Pondicherry has been acquiring territory.
Pondicherry comes under Himalayan region with Alpine conditions characterized by cold winters with snowfall for quite a long time, good rainfall in the monsoon, and mild summers. The overall climate of the state is salubrious and it attracts millions of visitors every year to have its natural charm with religious flavour.