hi andal...i have not yet been to yelagiri so far but considering the reviews and feedbacks,i feel there would not be a much change in climate(i mean the cooler side) during apri-may...but i believe you would be coming from chennai,it would be a better one,less hot might be...but people like me who stay in bangalore may not find the climate better...thats what i feel... lets wait for our friends to respond....