Kolkata weather today: Sunny skies, comfortable temperatures, but air quality concerns linger
Times of India | 18 December 2025
Kolkata, on December 18, 2025, awakens to a sunny morning characterized by clear skies and a cool breeze, creating an ideal environment for outdoor activities. The city's temperature is anticipated to fluctuate between 16°C and 27.6°C, promising a comfortable day. However, yesterday’s air quality was categorized as ‘Severe’ with an Air Quality Index (AQI) of 345, and residual pollutants may still be present, prompting a recommendation to carry a mask if heading into traffic-heavy areas or spending extended periods outdoors. The upcoming week is projected to feature consistently sunny weather and gradually rising temperatures, which could potentially aid in pollutant dispersal.
Today’s weather forecast indicates a pleasant day, with the maximum temperature reaching 27.6°C and the minimum settling at 16°C. Humidity levels are relatively low at 44%, contributing to the overall comfort. Gentle winds are expected, with a maximum speed of 12.2 kph, making conditions suitable for leisurely strolls or outdoor gatherings. The skies are predicted to remain clear throughout the day, with no chance of rain. The evening hours will bring a cool breeze, offering an excellent opportunity for outdoor dining or a walk along the Hooghly River.
Yesterday’s air quality presented a significant concern, as the AQI registered 345.
"Severe"
This classification firmly placed the air quality in the 'Severe' category. The primary pollutants identified included PM2.5 at 185 µg/m³, PM10 at 233 µg/m³, and elevated Carbon Monoxide (CO) levels of 572 µg/m³. Such poor air quality conditions could have led to breathing discomfort, particularly for individuals with pre-existing respiratory issues. While the sunny weather today may assist in dispersing some pollutants, the lingering effects of high PM2.5 levels necessitate continued caution, especially within congested urban areas.
When planning the day, it is crucial to balance the favorable weather conditions with an awareness of air quality. Carrying sunglasses is recommended for protection against the bright afternoon sun, and a mask is suggested for areas experiencing heavy traffic. Morning walkers can take advantage of the crisp, cool air. Evening outings are expected to be particularly enjoyable as temperatures begin to drop. Adequate hydration is important, especially for those who plan to spend extended hours outdoors.
The outlook for the next week promises consistently sunny weather across Kolkata, with temperatures expected to gradually increase. On December 19, the high temperature is forecast to be 28.2°C. December 20 and 21 will experience highs of 28.3°C and 28.7°C, respectively. Nighttime temperatures will remain cool, with lows ranging between 16°C and 18.6°C. December 22 and 23 are anticipated to be slightly warmer, with projected highs of 29.1°C and 29.5°C. The week will conclude on December 24 with a high of 29.8°C. For those planning outdoor activities, December 21 and 22 appear especially promising, offering clear skies and comfortable temperatures.
Yesterday’s severe air quality served as a significant reminder of Kolkata’s ongoing pollution challenges.
"stark reminder of Kolkata’s pollution challenges"
The forthcoming sunny weather presents an opportunity for improvement in air quality.
"a chance for improvement"
The consistent sunshine expected this week could actively help disperse pollutants from the atmosphere.
"help disperse pollutants"
This period is considered a good time to enjoy the outdoors before the winter season intensifies further. Residents are advised to monitor the AQI levels closely, particularly when venturing into busy parts of the city.
Data referenced in this article is taken from AQI.in.