Can't get to understand Chennais Climatic conditions

It's winter in Chennai now. It was raining yesterday night and today morning too. The weather was cool and good. As usual we had our model exams in the fore noon session. It was still cold out there and it was drizzling. The moment we finished our exams and got out of the examination hall the sun started to hit us. It's really hot and we've got a long way back to home. It is really sucking the glucose out of my blood till the last drop left. Man I'm really writing this in hatred as the same happened yesterday too. Can't really understand Chennais weather. Really blood draining.