Pune, Sep 19 (UNI) The Southwest Monsoon has been weaker over Arunachal Pradesh, Assam, Meghalaya, Sub-Himalayan & Gangetic West Bengal, Sikkim, Bihar, Uttarakhand, Punjab, Jammu-Kashmir, Ladakh, Gujarat Region, Saurashtra, Kutch, Madhya Maharashtra, Marathwada, Vidarbha, Chhatisgarh, coastal Andhra Pradesh, Telangana, Rayalseema, Tamil Nadu, coastal Karnataka, north & south Interior Karnataka and Kerala, said the India Meteorological Department on Thursday.