Tamil NaduMonday, 28 September 2026·The Hindu - Tamil Nadu
IMD says Northeast monsoon likely normal in Tamil Nadu; onset expected in October third week
IMD has said Tamil Nadu’s Northeast monsoon is likely to be normal in 2026, with onset conditions favourable in the October third week.
Key highlights
Direct fact
In September 2026, the India Meteorological Department said Tamil Nadu’s Northeast monsoon is likely to be normal, with favourable conditions for onset in the October third week and an average seasonal rainfall of 44 cm for the State.
Key specifics
- Tamil Nadu’s average Northeast monsoon rainfall: 44 cm.
- Onset window: October third week, according to IMD Director-General Mrutyunjay Mohapatra.
- South and coastal Tamil Nadu: likely to receive normal to above normal rainfall.
- North interior districts: predicted to receive below normal rainfall.
- Southwest monsoon deficit: 20%, with September 30 treated as the official end by IMD.
Exam lens
TN weather and geography MCQ focus: Northeast monsoon average rainfall, onset in October third week, 20% southwest monsoon deficit, and district-wise rainfall pattern; TNPSC may ask why the Northeast monsoon is crucial for Tamil Nadu.