Hottest monsoon in nine years: Tamil Nadu baked through June to September
Tamil Nadu recorded its warmest Southwest monsoon season in nine years, with a June to September mean of 29.45 degrees Celsius, about 1.21 degrees above the 2018-25 average, the Regional Meteorological Centre said.
Tamil Nadu has just lived through its warmest Southwest monsoon season in nine years, according to the Regional Meteorological Centre. The State's mean temperature for June to September was 29.45 degrees Celsius, nearly 1.21 degrees above the average for the same months across 2018 to 2025. July, August and September were each the warmest such months when set against the corresponding months of the last nine years.
A monsoon season is supposed to bring the State its break. Tamil Nadu receives the bulk of its rain from the Northeast monsoon, but the Southwest months still govern reservoir inflows from the Western Ghats, soil moisture, power demand and the length of the working day outdoors. Sustained heat across all four months therefore lands on more than comfort. It raises evaporation from tanks and fields, pushes electricity demand upward at precisely the season when supply has already become a political argument, and turns midday labour into a health risk for workers paid by the day.
The RMC finding also sits inside a sequence the State can no longer treat as exception. The analysis places this season alongside a recent run in which 2023, 2024 and 2025 were recorded globally as the three warmest years. For Tamil Nadu, the practical translation is not an abstract trend line. It is samba nurseries needing water earlier, cattle needing shade and fodder through longer hot spells, and municipal systems drawing down storage before the Northeast monsoon has even declared itself.
What the State does with a warning measured to two decimal places is now a governance question. Heat is rarely announced as failure in the way a power cut is, yet it taxes the same households first: outdoor workers, small farmers, the elderly in single-room homes, children walking to school at noon. A government measured by its response to visible breakdowns must also answer for the slow one, with shade, water, work-hour protection and honest reservoir accounting before the next season arrives hotter still.
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