§  Kolkata Heatwave Alert 2026

§  Mercury to Hit 40°C in March – Scorching Summer Ahead with Records Breaking.!

§  Winter Ends Early in January as Night Temps Jump 3°C Fast – El Nino Returns for India’s Hottest Year Yet

§  Temperatures rising fast – night lows near 18°C now, 40°C highs possible in March, heatwave in April

§  El Nino impact brings record-breaking summer heat, Latest forecast, risks & tips. #KolkataHeatwave #Summer2026 #IndiaWeather

The Daily Hints, Kolkata: Kolkata and much of West Bengal are saying goodbye to winter early, as night temperatures have jumped by almost 3°C in just 48 hours with the city touching around 18°C at night and 27°C during the day.
Experts warn that March 2026 could see mercury touching 38–40°C and April may bring another harsh heatwave, as El Niño returns in 2026, raising fears that this year will break recent heat records across India.

Details & Context

Kolkata recorded 14.8°C at night last Thursday, which shot up to 17.9°C last night, meaning night temperature rose by nearly 3°C in two days.
Day temperatures have also climbed with maximums around 27°C in late January, signaling that winter is ending earlier than usual and summer‑like warmth is arriving faster.

From mid‑February, daytime temperatures in Kolkata and southern Bengal are expected to hover around 32–34°C, while nights stay around 15–17°C.
By March, parts of West Bengal could see maximums reaching 38–40°C on some days and April is already being flagged for possible heatwave conditions, similar to earlier years when IMD issued heatwave alerts for several districts.

This pattern is linked to the return of El Niño in 2026, which climate scientists say is likely to develop by May–July and could be moderate to strong, increasing the risk of higher summer temperatures, weaker monsoon and more heatwaves across India.

What’s Happening in Different Regions

South Bengal (Kolkata & Coastal Areas)

·       Morning light fog over most districts but foggy days will gradually reduce in the coming days.

·       Night temperatures: 15–17°C in coastal and central districts, 11–14°C in western districts.

·       Day temperatures are slowly rising with Kolkata already touching 27°C in late January, hinting at early‑season heat stress.

North Bengal (Darjeeling, Jalpaiguri, Alipurduar, Sikkim)

·       No major change in minimum temperatures over the next five days.

·       Hilly Darjeeling: around 4–6°C at night.

·       Upper North Bengal districts: 10–13°C at night.

·       Lower North Bengal districts: 14–16°C at night.

Western Disturbance Impact

·       A strong western disturbance is affecting north Bengal, bringing light snowfall in Darjeeling hills and light rain in Kalimpong, Jalpaiguri, Alipurduar and Sikkim.

·       A new western disturbance is expected on 30 January with an active trough stretching from west Rajasthan to Punjab and into the north‑east Arabian Sea, influencing weather over northwest India and parts of West Bengal.

Cold Wave and Fog in North‑West India

·       Cold wave and dense fog continue over Delhi and other north‑west plains, including Punjab, Chandigarh, Haryana and Himachal Pradesh.

·       Fog is expected to intensify in some areas, causing travel disruptions and poor visibility.

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Quotes

·       Weather forecasters (IMD‑linked sources)
“Night temperatures in Kolkata have risen by almost 3°C in 48 hours; winter is ending early and summer‑like heat is arriving sooner.”

·       Climate experts on El Niño 2026
“El Niño is likely to develop between May and July 2026 and could be moderate to strong, increasing the risk of heatwaves and a weaker monsoon.”

·       Local forecast summary (South Bengal)
“In the coming days, minimum temperatures in coastal and central Bengal will remain 15–17°C, while western districts will see 11–14°C with day temperatures slowly rising.”

Additional Information (Deep Research Angle)

Recent data for Kolkata in January 2026 shows that average temperatures have been slightly above normal with maximums touching 30–31°C and minimums around 16–19°C towards the end of the month.
Historical heatwave bulletins for West Bengal indicate that heatwave conditions have already been flagged in April in recent years and 2026 is expected to see similar or stronger heat stress, especially in interior districts.

El Niño years often bring higher summer temperatures and increased heatwave risk and early 2026 signals are already showing warming trends and reduced rainfall in many parts of India, raising concerns about drought and crop stress.

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Impact Analysis (Why This Matters)

·       Health impact: Rising night temperatures and early‑season heat can increase heat‑related illnesses, especially among the elderly, children and outdoor workers.

·       Agriculture & water: A strong El Niño may lead to weaker monsoon rains, affecting kharif crops, reservoir levels and drinking‑water supply.

·       Daily life: Fog and cold wave in north‑west India will disrupt flights, trains and road travel, while early heat in Bengal will force people to use fans and coolers earlier than usual.

For Kolkata and West Bengal, the key message is: prepare for an early, hot summer with March and April likely to be much warmer than recent years.

Conclusion

The rapid rise in night temperatures in Kolkata, combined with El Niño‑linked warming in 2026, suggests that this year could break recent heat records and bring longer, harsher summers across India.
From February warmth to possible 40°C days in March and April heatwaves, the weather pattern is clearly shifting and citizens, farmers and authorities need to plan for higher heat stress and water‑related challenges.

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