Introduction
As Kolkata steps deeper into May, residents brace for intensifying heat and eagerly await relief from the upcoming monsoon. This weekâs weather forecast brings a mix of scorching temperatures, occasional thunderstorms, and critical advisories from the India Meteorological Department (IMD). Whether you’re planning your daily commute or a weekend outing, hereâs everything you need to know about Kolkata’s weather.
đĄ Current Weather Conditions in Kolkata
As of May 12, 2025, Kolkata is experiencing intense heat, with temperatures hovering around 38°C to 40°C during the day and a warm 27°C to 29°C at night. The RealFeelÂŽ temperature, according to AccuWeather, touches 44°C during peak afternoon hours due to high humidity levels around 60â70%.
- UV Index: 10 (Very High) â Avoid prolonged exposure during 11 AM â 4 PM.
- Air Quality: Moderate â Sensitive individuals should reduce outdoor activity.
- Wind: Southwesterly at 15 km/h â Bringing mild relief in the evenings.

đŠ Thunderstorm Alerts & Rainfall Possibility
The IMD has issued yellow alerts for isolated thunderstorms in and around South Bengal, including Kolkata, between May 14 and May 16. These thunderstorms may bring gusty winds (30â40 km/h) and light to moderate rainfall in the evenings.
However, these pre-monsoon showers will offer only temporary relief from the sweltering heat. The temperature is expected to remain above 35°C throughout the week.
Forecast at a Glance (May 12âMay 18):
Date | Max Temp | Min Temp | Rain Probability | Conditions |
---|---|---|---|---|
May 12 | 40°C | 28°C | 10% | Sunny and humid |
May 13 | 39°C | 28°C | 20% | Partly cloudy |
May 14 | 38°C | 27°C | 40% | Thunderstorms likely |
May 15 | 37°C | 27°C | 50% | Thunderstorms |
May 16 | 36°C | 26°C | 30% | Light rain possible |
May 17 | 37°C | 27°C | 10% | Sunny intervals |
May 18 | 39°C | 28°C | 10% | Hot and dry |

đ§ When Will the Monsoon Arrive in Kolkata?
According to meteorologists, the Southwest Monsoon is likely to hit Kerala around May 31, and Kolkata can expect its onset by June 10â12, subject to wind patterns and sea surface temperatures. The early pre-monsoon showers currently observed are indicators of the changing seasonal winds but not full-fledged monsoon rainfall.
Farmers, transport operators, and festival organizers are advised to track IMD updates and prepare accordingly.
âMonsoon in Bengal is expected to be normal this year, with slightly delayed onset in the Kolkata region,â said a senior IMD official during a press briefing.
đ§ Tips to Beat the Heat in Kolkata
- Stay hydrated â drink at least 3â4 liters of water daily.
- Wear light cotton clothes and avoid dark colors.
- Avoid going out between 12 PM and 4 PM.
- Use umbrellas or hats when stepping outside.
- Children and the elderly should stay indoors during peak hours.
For workplaces and schools, itâs essential to ensure ventilation and encourage flexible scheduling during extreme heat alerts.
Conclusion
This week in Kolkata will be a blend of extreme heat, short spells of rain, and high humidity levels. While minor thunderstorms may offer a fleeting break, the full monsoon is still a few weeks away. Citizens are urged to follow weather advisories, take heat protection measures seriously, and prepare for the seasonal transition.
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