You mean weekend spots for 2 days from Kolkata right? If yes you could check on the following weekend spots from Kolkata. Digha is 180kms away from Kolkata Shantiniketan 163kms away
Mandarmani beach 175km away
Purulia is 290km away
Bakkhali beach town is 125km away
Netrahat hills are 575kms away
Lava is 675kms away
Lolegaon is 609kms away
Sittong is 580kms away
Tinchuley is 600kms away.
It would be hot and humid anywhere you visit except North Bengal. You can still consider the following:
Bakkhali Bangriposi
Puri
Chandipur Sundarbans Boat Trip or Island Stay
Diamond Harbour Taki
There are many places to visit. Depends on what kind of experience you are looking for. Bolpur is also a nice place for both leisure and cultural experience.