Dear Dev ,

Mostly it depends upon you but if we go through the Chennai atmosphere then Chennai, the weather is usually hot and humid, except during the September to December monsoon season, which heralds a cooler climate. The rains bolster critical water sources, but if there is a deficient monsoon season, reservoirs can run dry causing the city's water supply to dip. Residents then rely heavily on groundwater, which is not always potable, forcing them to buy drinking water. Excessive withdrawal of groundwater has, meanwhile, also led to the lowering of the water table in the city and nearby areas.

If we go through the above mentioned  lines then we definitely know about Chennai is little bit  hot weather but some of time it will depends upon our body structure like i don't need AC rooms because im comfortable with all season but you can try first NON -AC rooms because now is monsoon and winter season are running when summer season will come if you not comfortable with non ac hostels then you can change your hostel rooms .

I hope it will helpful

Thanks