During the summer season, the weather in Kolkata remains extremely hot and humid and so in scorching heat, sightseeing in Kolkata may not be a convenient experience. However, the post-monsoon period brings in a pleasant weather. Besides, this is also the time when you can feel Kolkata's festive spirit and zeal come alive. During Durga Pooja, with many pandals all over the city and with the local people soaking in the celebratory spirit, the atmosphere of Kolkata livens up further. You have to feel the fervour to believe it. During the winter season, the temperature drops further and makes for a pleasant atmosphere. Thus, post autumn –winter can prove to be the best season to visit Kolkata.