Monsoon has weakened since the end of last week, IMD, which has forecast 8 and 10 per cent less than normal rainfall in July and August respectively, said.
The east and northwest India, which initially recorded good rainfall, received just one per cent of overall normal rain so far. The northeastern states of Nagaland, Meghalaya, Mizoram and Tripura have received 31 per cent deficient rainfall this month, while Bihar got 27 per cent less rain than normal.
However, the Central (23 per cent) and Northwest India (31 per cent) have recorded good precipitation.
IMD has already asked the Agriculture department to keep a contingency plan ready to tackle the situation arising out of inadequate rain.
The Southwest Monsoon made its entry on June 5 after a delay of four days. However, it quickly covered the entire country by June 26, almost 20 days ahead of the normal date July 15.