Southwest Monsoon has covered the entire country on 26th June, 2015, 20 days ahead of its normal date. The seasonal Monsoon trough which usually anchors in North India has moved a little north, closer to the Himalayas. An efficient Low Pressure system embedded inside this trough will trigger heavy rains across east and north eastern states of India. Another off-shore trough near Kerala and coastal Karnataka will lead to heavy rains along these regions. Meanwhile, large parts of TN will have to look up the skies for a thirst quencher, and can expect a slight drop in day time temperatures. Isolated areas of Coimbatore and Nilgiris districts.
Chennai will have a cloudy/humid day with maximum temperature of 37 C. Chances of scattered Thunderstorms across city/suburbs during late evening/night.
Coimbatore will stay much comfortable at 31 C, with chances of isolated rains.
Madurai could see partly cloudy skies with a maximum temperature of 37 C.