·       Major Weather Update from Alipur Meteorological Department

·       Winter Chills to Grip Kolkata in Just 2-3 Days, Temperature Drop 15°C This Weekend, Winter Alert

·       Meteorological Department Forecast

·       Minimum temperatures across Kolkata and multiple districts will drop close to 15 degrees Celsius by the weekend

Kolkata: Winter has finally arrived in the City of Joy.! After weeks of unusually warm weather and delayed seasonal transition, Kolkata is set to experience its first major temperature plunge of the season. The Alipore Meteorological Department announced on Tuesday that starting from Wednesday, South Bengal will witness a substantial temperature drop spanning 2-3 degrees Celsius. By the weekend, the minimum temperature in Kolkata will hover around 15 degrees Celsius—the coldest it has been since November ended. This marks the official beginning of winter in the region, bringing much-needed relief from the prolonged warm weather that characterized the month.

DETAILS & CONTEXT: Understanding the Weather System

Temperature Predictions: What Residents Need to Know

The Alipore Meteorological Department has provided detailed temperature forecasts for the coming week. According to official meteorological data, Kolkata’s minimum temperature will reach approximately 15 degrees Celsius by the weekend—a significant drop from the current readings hovering near 18-20 degrees Celsius. This represents the first time since early November that temperatures have approached this level in the city.

More critically, western districts of West Bengal will experience even colder conditions with minimum temperatures potentially dropping to 11-12 degrees Celsius. This sharp decline marks a transition from the anomalously warm weather that has persisted throughout November, confounding earlier seasonal predictions.

Why Winter Was Delayed: The Meteorological Explanation

Weather experts explain the delayed onset of winter through a unique atmospheric phenomenon occurring over the Bay of Bengal. According to meteorologists at the Alipore Weather Station, successive cyclonic systems forming over the Bay of Bengal have intensified southeasterly winds. These warm winds have effectively blocked the typical northwesterly wind patterns that normally bring cold air from the Himalayan regions into South Bengal.

The meteorological department states: “Successive cyclones over the Bay of Bengal created a barrier against the typical winter wind patterns. The strong southeasterly winds overpowered the weaker northwesterly winds, delaying the seasonal temperature decline we normally observe in December.”

This atmospheric blocking effect essentially postponed winter’s arrival by nearly 2-3 weeks compared to historical averages. With the weakening of these cyclonic systems, northwesterly winds are now regaining strength, allowing cold continental air to surge southward into the Bengal region.

QUOTES: Official Statements & Expert Analysis

·       Alipure Meteorological Department Statement
“Starting from Wednesday, December 3, 2025, South Bengal will experience consistent temperature decline. By weekend, minimum temperatures in Kolkata will stabilize around 15 degrees Celsius with western districts potentially dropping to 11-12 degrees. This marks the official arrival of winter in the region.”

·       Meteorologists’ Explanation
“The Bay of Bengal cyclonic systems created an unprecedented atmospheric block against winter wind patterns. Now that these systems are weakening, cold air from the continental interior is advancing southward, bringing winter to Bengal as expected.”

·       Weather Forecast Authority
“We expect dry weather conditions to prevail from Tuesday onwards. While morning clouds and moisture may persist initially, afternoon sunshine will dominate as the week progresses, accompanying the temperature drop.”

ADDITIONAL INFORMATION: Extended Weather Analysis

Weekly Weather Breakdown

·       Tuesday (Today): Partly cloudy morning with humid conditions. Temperature gradually beginning to decline. Afternoon sunshine expected. Minimum around 18°C.

·       Wednesday (Tomorrow): Clear skies expected. Northwesterly winds strengthening. Noticeable temperature drop begins. Minimum expected: 16-17°C.

·       Thursday-Friday: Continued temperature decline. Dry weather conditions. Clear nights with radiative cooling. Minimum: 15-16°C.

·       Saturday-Sunday (Weekend): Peak cold period arrives. Minimum temperatures approaching 15°C in Kolkata. Western districts: 11-12°C. Clear, bright conditions with chilly mornings and evenings.

Humidity & Precipitation Forecast

The meteorological department confirms that no significant rainfall is expected from Tuesday through Sunday. South Bengal will experience predominantly dry weather as cold, dense air from the north displaces moist air from maritime sources. While Tuesday morning may show some cloudiness and atmospheric moisture, afternoon clearing is anticipated.

This dry weather pattern is typical of winter season transition, as cold high-pressure systems bring drier continental air masses into South Bengal, replacing the moisture-laden southeasterly flow that dominated November.

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IMPACT ANALYSIS: What This Means for Kolkata Residents

Health Considerations

The sudden 2-3 degree temperature drop will particularly affect vulnerable populations including the elderly, young children and individuals with respiratory conditions. Medical professionals recommend

·       Increasing warm clothing layers

·       Maintaining adequate hydration despite cool temperatures

·       Ensuring proper ventilation to prevent indoor air quality degradation

·       Using heaters safely with proper ventilation to avoid carbon monoxide accumulation

Daily Life Adjustments

The temperature drop will impact daily routines across the city:

·       Morning Commutes: Early morning commuters should expect significantly cooler conditions, particularly from Thursday onwards. Public transportation will likely see increased passenger comfort as cooler morning temperatures reduce summer-like heat stress.

·       Evening Activities: Street food vendors and evening gathering spots will become more frequented as pleasant weather encourages outdoor activities. Parks and public spaces will see increased foot traffic as residents enjoy the comfortable climate.

·       Agricultural Impact: For surrounding agricultural areas, the temperature drop signals transition into winter crop cultivation season. Farmers will begin adjusting irrigation practices and crop management strategies appropriate for cooler temperatures.

Energy Consumption Patterns

The cooling weather will likely shift energy consumption patterns. While air conditioning usage will decline significantly, heating device usage will increase, particularly in northern West Bengal districts. Electric utilities anticipate management of load shifts as residents adjust to seasonal heating needs.

COMPARATIVE ANALYSIS: This Winter vs. Previous Years

November Temperature Anomaly
In November 2025, minimum temperatures remained above 18 degrees Celsius throughout the month—significantly higher than the 30-year average of 15-16 degrees Celsius. This meant November 2025 was approximately 2-3 degrees warmer than historical norms.

This Weekend’s Cooling
The anticipated 15-degree temperatures this weekend represent a return to historical seasonal norms. The sharp 3-degree drop over just 48-72 hours will be more abrupt than typical seasonal transitions, making the temperature change more noticeable to residents.

Western Bengal Comparison
While Kolkata approaches 15 degrees, western districts dropping to 11-12 degrees represents genuine winter conditions. This geographical temperature gradient reflects the influence of proximity to the Bay of Bengal, which moderates Kolkata’s coastal climate compared to interior western regions.

METEOROLOGICAL SIGNIFICANCE

This weather system transition marks a significant shift in atmospheric circulation patterns. The northwesterly wind surge that will bring cold air into South Bengal is associated with the strengthening of the Siberian High-pressure system—the dominant weather pattern during the Northern Hemisphere winter season.

The breakdown of Bay of Bengal cyclonic systems allows this high-pressure influence to extend southeastward, bringing cold continental air from Central Asia and northern India into Bengal. This process typically intensifies through December and January with January normally being the coldest month.

CONCLUSION: Winter Finally Arrives

After an unusually prolonged warm period in November, Kolkata can finally expect authentic winter weather. Starting from Wednesday and intensifying through the weekend, temperatures will drop sharply as meteorological systems align to bring cold continental air into South Bengal. The Alipore Meteorological Department’s forecast of 15-degree minimum temperatures by weekend represents the official threshold for winter season onset in the region.

Residents should prepare for this temperature transition by adjusting clothing, ensuring home heating adequacy and making necessary lifestyle modifications. The extended dry forecast suggests pleasant conditions accompanying the cooling trend, likely encouraging outdoor activities and evening social gatherings.

For the broader region, this weather pattern signals the beginning of the winter agricultural season, shift in energy consumption patterns and adjustment of daily routines to accommodate seasonal changes. Weather patterns are expected to remain stable through the coming week with temperatures potentially dropping further into January.

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