Tamil Nadu weather : Thunderstorms again possible today in isolated places in North Tamil Nadu in KTCC ( Chennai and Surrounding districts), Pondy, Cuddalore, Ranipet, Vellore, Tiruvallur ... Chennai experiences cloudy skies, intermittent showers, and rising winds as Cyclone Montha approaches. IMD warns of heavy rainfall in north Tamil Nadu and Puducherry. Be prepared with the most accurate 10-day forecast for Chennai, Tamil Nadu 600009 with highs, lows, chance of precipitation from The Weather Channel and Weather .com Everything you need to know about tomorrow ' s weather in Chennai, Tamil Nadu, India. High/Low, Precipitation Chances, Sunrise/Sunset, and tomorrow 's Temperature History.