End of the Northeast Monsoon Season in Tamil Nadu

Confirmation of Monsoon Withdrawal

End of the Northeast Monsoon Season in Tamil Nadu: The Northeast Monsoon officially retreated from Tamil Nadu on 19 January 2026. This was confirmed by the Regional Meteorological Centre, marking the climatic transition into the winter phase. The retreat signals the end of the primary rainfall season for the state.

This withdrawal is a regular seasonal process but varies annually based on atmospheric circulation. In 2026, the retreat occurred after intermittent winter rainfall events.

Significance of the Northeast Monsoon

The Northeast Monsoon is the main rainy season for Tamil Nadu, unlike most parts of India that depend on the Southwest Monsoon. It generally spans from October to December, contributing nearly 48–50% of the state’s annual rainfall.

Static GK fact: Tamil Nadu receives more rainfall from the Northeast Monsoon than the Southwest Monsoon, making it unique among Indian states.

Post-Monsoon Weather Changes

Following the withdrawal, misty mornings and chilly nights were reported across several districts. Minimum temperatures dropped by 2–3°C below normal in many interior regions. Clear skies during nighttime enhanced radiational cooling.

These conditions are typical after monsoon retreat due to reduced cloud cover and dry continental winds.

Temperature Extremes Recorded

On 20 January 2026, Tiruttani recorded the lowest temperature among plain areas at 15.2°C. Among hill stations, Kodaikanal registered a sharp low of 6°C, reflecting strong nocturnal cooling.

Static GK Tip: Hill stations experience lower temperatures due to altitude-related lapse rates, where temperature decreases with height.

Short-Term Weather Outlook

Dry weather and clear skies are expected to prevail over Tamil Nadu and Puducherry till 22 January 2026. These conditions will continue to support cooler night temperatures and mild daytime weather.

Such stable conditions are common immediately after monsoon withdrawal.

Incoming Upper Air Circulation

An upper air circulation over the southeast Bay of Bengal is expected to influence regional weather from 23 January 2026. This system may bring light to moderate rainfall, beginning along coastal districts and gradually extending inland.

These winter rain events are often localized and short-lived.

Winter Rainfall Performance

Since 1 January 2026, Tamil Nadu has recorded a winter rainfall surplus of 25.8 mm. Several districts have already reported excess rainfall, contributing positively to groundwater recharge and soil moisture.

Static GK fact: Winter rainfall in Tamil Nadu is mainly influenced by easterly waves and upper air circulations over the Bay of Bengal.

Static Usthadian Current Affairs Table

End of the Northeast Monsoon Season in Tamil Nadu: