Why 'weather kolkata' Spiked in September 2026: Rain Alerts and Festival Impact

Why 'weather kolkata' Spiked in September 2026

Google Trends India recorded about 200 searches for “weather kolkata” on 19 September 2026, showing 100% growth over the previous 24 hours. The spike followed heavy rain and thunderstorms across Kolkata and south Bengal, prompting readers in India to look for live forecasts and rain alerts. Google Trends measures search interest, not the truth of news events, and these figures apply only to September 2026; conditions in November 2026 may differ significantly.

Heavy Rain and Thunderstorms in Kolkata

A Times of India report dated 17 September 2026 said heavy rain, thunder and lightning pounded areas such as Salt Lake, New Town, Lake Town, Dum Dum and Howrah. Salt Lake recorded more than 50 mm of rainfall after a steady downpour of about one-and-a-half hours, flooding parts of Sector V. H R Biswas, head of the Regional Meteorological Centre in Kolkata, said the main reason behind the thunderstorm was an upper air trough from Sikkim to Odisha across Gangetic West Bengal. In meteorological terms, a trough is an elongated stretch of low atmospheric pressure that forces warm, moist air upward into an unstable environment. The heating, abundant moisture and diverse wind patterns in different layers played together to pull off intense cloud formation, plunging parts of Kolkata into darkness as early as 1:30 pm. The report also noted that Kolkata had seen rain on 10 of the first 17 days of September, while a dry spell in the preceding three days had pushed maximum temperatures above normal.

Read the Times of India report

IMD Forecast: Gusty Winds and Low Pressure

The Deccan Herald reported on 18 September 2026 that the India Meteorological Department expected gusty winds reaching speeds of 30 to 40 kmph over south Bengal districts. IMD also indicated that a low-pressure area could form over the north Andaman Sea, with possible movement toward south Odisha and north Andhra Pradesh. RMC Kolkata said there was no certainty at that time about a cyclonic storm developing from the system over north Thailand.

Read the Deccan Herald report

Vishwakarma Puja and Kite-Flying Concerns

The Times of India article warned that rain could spoil Vishwakarma Puja kite-flying celebrations scheduled for Friday. Thunderstorms were still possible in Kolkata and other parts of south Bengal that day, though with reduced intensity in the city. For many Kolkata residents, the search spike reflected practical concerns about festival plans, travel disruptions and sudden downpours.

Search Behaviour and Public Response

The timing helps explain the behaviour: users searching “kolkata weather” or “weather kolkata” were likely seeking hour-by-hour rain updates ahead of a public holiday, not long-term climate data. Search volume alone does not confirm damage or casualties, and no cyclone was confirmed for Kolkata at the time.

What Readers Should Check Today

This article explains a September 2026 search trend, not current weather. Readers looking for live Kolkata weather in November 2026 should consult the India Meteorological Department or a reliable weather service for up-to-date forecasts, since monsoon-retreat patterns change quickly after September.