NEW DELHI: Southwest (summer) monsoon is likely to start withdrawing from northwest India around Sept 15, two days ahead of its normal date of withdrawal, IMD said Friday.Monsoon usually starts retreating from northwest around Sept 17 and withdraws completely by Oct 15. “Conditions are becoming favourable for withdrawal of southwest monsoon from some parts of west Rajasthan around Sept 15,” Met department said.Monsoon this year hit Kerala on May 24, the earliest onset since 2009 when it arrived on May 23, and covered the entire county by June 29. This was also the earliest monsoon covered the entire country since 2020 when it did so by June 26.So far, the country has already reported 7.4% higher than normal cumulative rainfall during monsoon till Friday. Except east and North-East that reported a deficit of over 20%, other homogenous regions of the country experienced more than normal rainfall during monsoon.