It was quite hot, but I stayed pretty far south which doesn't seem to get the 140 degree days of some of the northern cities.

Chennai was the only place where the heat got to me, I think it was the combination of the heat with the extremely thick air pollution. I only stayed a few days before I hoped a train out of town.

Spent time in both Bangalore and and Mysore which I liked a lot and both are at higher elevations and a bit cooler, the heat didn't bother me at all there. Also spent time in Trichy (a few hours south of Chennai by train) for the wedding and most of that time was spent indoors with friends so no problems there.

The heat wasn't any worse that Thailand or Singapore and I wouldn't let that stop you from visiting in June.

The people to whose wedding I went honeymooned in Karala afterwards and loved every minute. After seeing the pictures, I think I may be going soon!