Though officially the onset of monsoon in the country is yet to be declared, the northern limit of monsoon has touched the extreme south/ southeast part of Bangladesh close to Mizoram. The normal date of onset of monsoon over Kerala Coast is June 1, while over the city of Guwahati, the onset normally takes place on June 5. By June 6, NE region is generally covered by monsoon. However, variation of seven days in this respect is quite possible, said H Pathak, Director of the Regional Meteorology Centre (RMC) here.