• The Daily Hints
• 19 Oct, 2025

§  Will it rain on Kali Puja 2025 in Kolkata.?

§  Is Kali Puja weather good for celebrations.?

§  Which districts will receive rain in Bengal today.?

§  When will Bay of Bengal cyclone form in October.?

§  What is the weather forecast for Diwali 2025 in West Bengal.?

As West Bengal gears up for the grand Kali Puja celebrations on Monday, October 21, 2025 the India Meteorological Department (IMD) has delivered welcome news for festival enthusiasts: despite scattered thunderstorms expected in select districts today, the main festive period from Monday through Wednesday will enjoy clear, sunny skies with absolutely no rain.

The weather forecast brings relief to millions planning outdoor celebrations, pandal hopping and traditional rituals during Kali Puja, Diwali (Deepavali) and Bhai Phota (Bhai Dooj) festivities. However, residents in four southern Bengal districts and three northern hill districts should prepare for light to moderate rainfall with thunderstorms on Sunday, October 19.

Today’s Weather Snapshot: Sunday Rain Alert

Sunday morning has dawned with cloudy to partly cloudy skies across West Bengal. The Alipore Meteorological Department reports that temperatures will remain above normal, creating warm and humid conditions throughout the day. The mercury in Kolkata is hovering around 33°C with minimum temperatures settling at approximately 24-26°C.

Light to moderate rainfall accompanied by thunderstorms and lightning is forecast for coastal districts including North 24 Parganas, South 24 Parganas, Purba Midnapore (East Midnapore) and Paschim Midnapore (West Midnapore). These showers are attributed to the interaction between southerly and westerly wind patterns creating localized weather disturbances.

The IMD has not issued any major weather warnings for the state and fishermen along the coast have been given clearance to continue normal operations as sea conditions remain calm. Other districts in South Bengal including Kolkata, Howrah, Hooghly, Burdwan and Nadia are expected to experience partly cloudy skies without significant precipitation.

South Bengal Weather Breakdown

The coastal and adjoining districts of South Bengal will bear the brunt of Sunday’s weather activity. The Regional Meteorological Centre in Kolkata’s Alipore has specifically highlighted North and South 24 Parganas along with East and West Midnapore as areas where residents might witness light to moderate showers with thunderstorms.

“There is a possibility of rain with thunderstorms and lightning in six districts on Saturday and Sunday,” confirmed an official from the Alipore Met Department. The rain is occurring due to the convergence of wind systems and will bring temporary relief from the warm weather that has persisted following the monsoon withdrawal.”

However, the meteorological department has emphasized that these weather conditions are temporary and localized. From Monday onwards, the festive days will witness a dramatic improvement with the official stating, “The weather on festive days will remain clear. There is less chance of rain on those days”.

Starting Tuesday, October 22, the skies across South Bengal will turn bright and sunny with no rainfall anticipated. The partly cloudy conditions expected Monday morning will give way to brilliant sunshine as the day progresses, creating perfect conditions for outdoor celebrations and pandal visits.

Festival Weather Guarantee: Monday to Wednesday

In what will be music to the ears of celebration planners, the IMD has issued a categorical forecast: No rain is expected during Kali Puja, Diwali and Bhai Phota from Monday, October 21 through Wednesday, October 23, 2025.

“Kali Puja, Diwali and Bhai Phota celebrations from Monday to Wednesday will not face any rain interruptions,” the meteorological department confirmed in its latest bulletin. Monday may start with partially cloudy skies in the morning but as the day unfolds, expect radiant sunshine and completely clear skies with zero probability of precipitation.

This weather window is ideal for the elaborate outdoor festivities that characterize Kali Puja in Bengal. From setting up massive pandals to organizing cultural programs, lighting fireworks and conducting traditional rituals, organizers can proceed with confidence knowing that weather will not be a spoilsport.

The temperature during the festival days is expected to range between 24°C and 33°C in Kolkata, providing comfortable conditions for both daytime and nighttime celebrations. The humidity levels will gradually decrease from Monday as moisture content in the atmosphere reduces following the complete withdrawal of the southwest monsoon.

North Bengal Weather Outlook

The hill districts of North Bengal present a slightly different weather picture. Darjeeling and Kalimpong are forecast to receive light rainfall with thunderstorms on Sunday with the possibility extending into Monday as well. Jalpaiguri district may also witness isolated light showers in some areas.

However, the rest of North Bengal including districts like Alipurduar, Coochbehar and the Dinajpur regions will experience dry weather conditions with no rainfall expected. From Monday onwards, even the hill districts will transition to clear, dry weather with sunny skies dominating the landscape.

An interesting meteorological phenomenon predicted for North Bengal is the formation of morning fog in the coming days. “From Monday, North Bengal will have dry weather with clear, sunny skies and some morning fog,” the IMD noted. This fog will add a mystical quality to the Himalayan foothills during the early hours but will dissipate quickly as temperatures rise through the day.

Bay of Bengal Cyclone Alert: October 24 System

While the immediate festive period remains weather-safe, the IMD has issued an important advisory about developing weather systems in the seas surrounding India. A cyclonic circulation is currently forming over the South Andaman Sea adjacent to the southeast Bay of Bengal, extending up to 1.5 kilometers above mean sea level.

“Under its influence, a low-pressure area is likely to form over the southeast Bay of Bengal around October 24,” the IMD bulletin states. This system is expected to move in a west-northwest direction and intensify into a deep depression by October 24 with the potential for further strengthening thereafter.

The IMD’s Tropical Cyclone Forecast Programme Report indicates a favorable environment for cyclogenesis (formation of a depression) over the Bay of Bengal during October 24-26. Model guidance suggests the system could intensify while moving toward the Tamil Nadu coast or potentially heading toward Bangladesh, though the exact trajectory remains uncertain and is being closely monitored.

“Both systems are under continuous watch,” the IMD emphasized, referring to concurrent weather developments over the Arabian Sea as well. West Bengal residents should stay tuned for further updates as October progresses, though the system is not expected to impact the state during the immediate festive period.

Historical Context and Seasonal Patterns

October marks a transitional period in India’s meteorological calendar, characterized by the complete withdrawal of the southwest monsoon and the beginning of the post-monsoon or northeast monsoon season. This period, particularly October and November is historically known for cyclone formation over the Bay of Bengal.

The 1999 super cyclone that devastated Odisha on October 29 remains one of the most catastrophic weather events in Indian history. Subsequent October cyclones including Phailin (2013), Hudhud (2014), Titli (2018) and most recently Dana (2024) underscore the Bay of Bengal’s cyclone-prone nature during this season.

West Bengal has been gradually transitioning from monsoon to winter conditions. The withdrawal of the monsoon has led to decreasing moisture levels in the atmosphere, causing particulate matter (PM) to hang low in the air. This has resulted in Kolkata's Air Quality Index (AQI) rising to the “poor” category with readings around 242-252 in some parts of the city as of Saturday.

The West Bengal Pollution Control Board (WBPCB) attributes the elevated AQI primarily to weather changes rather than early firecracker bursting, though construction activities in congested residential areas have also contributed. PCB teams will maintain 24×7 vigilance during Kali Puja to monitor air quality and firecracker-related pollution.

Temperature and Comfort Analysis

The temperature profile for the festive period indicates pleasant conditions conducive to outdoor activities. Kolkata experienced a bright, sunny Sunday morning on October 19 with temperatures expected to reach 33°C amid clear skies. The week ahead promises continued sunshine until Wednesday with temperatures ranging from 24.2°C minimum to 33°C maximum.

Wind speeds will reach approximately 14 km/h, creating gentle breezes that will help dissipate humidity and provide natural ventilation during crowded pandal visits. The humidity level is expected to hover around 67%, which is manageable compared to the oppressive moisture levels experienced during peak monsoon.

Night temperatures have been dropping gradually across the state, particularly in rural areas where the winter chill is becoming increasingly noticeable during early morning and evening hours. This temperature drop is a welcome change after the prolonged monsoon season that saw multiple flood episodes affecting districts like Ghatal and other low-lying areas.

Regional Variations Across India

While West Bengal prepares for clear festive weather, other parts of India present varied meteorological conditions. Southern states including Kerala, Tamil Nadu, Karnataka, Andhra Pradesh and Telangana continue to experience persistent rainfall as lingering monsoon systems affect these regions.

Delhi and North India are experiencing a different set of conditions with cooler temperatures arriving alongside rising pollution levels. The national capital recorded an AQI of 254 in the “poor” category with light fog expected in mornings until October 23. Maximum temperatures in Delhi range around 33°C with minimums dropping to 19-21°C.

Central and eastern Indian states including Odisha, Chhattisgarh, Jharkhand and parts of Madhya Pradesh may experience thunderstorms and light rainfall between October 19-21, potentially affecting Diwali celebrations in those regions. Maharashtra and Goa could see moderate rainfall accompanied by thunder during this period.

Read More: Dev's Bold Promise: House-to-House Campaign to Fast-Track Ghatal Master Plan

Expert Recommendations and Preparedness

Meteorological experts advise West Bengal residents to enjoy the favorable weather window while remaining informed about developing systems in the Bay of Bengal. Dr. Manorama Mohanty, Director of the Bhubaneswar Meteorological Centre, stated, “We are closely monitoring the anticipated weather system and more details like its further intensity and path will be known in the coming days”.

·       For those planning extensive outdoor celebrations, the following recommendations apply

o   For Sunday (October 19): Residents in coastal districts (24 Parganas, Midnapore) and hill areas (Darjeeling, Kalimpong) should carry umbrellas and be prepared for sudden thunderstorms with lightning. Avoid open spaces during lightning activity and stay indoors if possible during peak storm periods.

o   For Monday to Wednesday (October 21-23): Perfect weather conditions allow for uninhibited festival celebrations. Apply sunscreen for extended outdoor activities as UV exposure will be moderate to high under clear skies. Stay hydrated as temperatures will remain in the low 30s Celsius range.

o   Air Quality Precautions: With AQI in the moderate to poor range individuals with respiratory sensitivities should consider wearing masks in high-traffic areas. The West Bengal Pollution Control Board’s control room is operational 24×7 to receive complaints about illegal firecracker use.

Looking Beyond the Festival Week

As October progresses beyond the festive period, West Bengal can expect continuation of dry, pleasant weather conditions with gradually decreasing temperatures signaling the approach of winter. The traditional post-Diwali period typically sees morning fog becoming more pronounced, particularly in North Bengal and rural areas of South Bengal.

However, the developing low-pressure system over the Bay of Bengal warrants attention starting October 24 onwards. While current models suggest the system will move toward southern coastal regions or Bangladesh, any westward deviation could bring rainfall to coastal Bengal districts. The IMD will issue updated forecasts and warnings as the system’s trajectory becomes clearer.

The favorable atmospheric conditions this year stand in stark contrast to several recent years when unseasonal rains disrupted festival celebrations. Weather modeling and forecasting capabilities have improved significantly, allowing authorities and citizens to plan celebrations with greater confidence and preparedness.

The Perfect Festival Confluence

The convergence of major Hindu festivals—Kali Puja, Diwali and Bhai Phota—during a period of exceptionally clear weather creates ideal conditions for West Bengal’s signature celebration style. The state’s unique tradition of elaborate artistic pandals, combined with cultural programs, traditional rituals and community gatherings, thrives under favorable meteorological conditions.

From the bustling streets of Kolkata to the serene landscapes of rural Bengal, communities can execute their celebration plans without the anxiety of weather disruptions. The three-day dry spell from Monday to Wednesday provides an uninterrupted window for religious observances, family reunions, pandal visits and the exchange of festive greetings that define this cherished time of year.

As West Bengal illuminates with millions of earthen lamps, electric lights and fireworks, the clear skies overhead will mirror the festive radiance below, creating a spectacular visual symphony that embodies the spirit of the festival of lights.

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