

Could the recent rise in humidity, light showers and stronger winds in Coimbatore be doing more than just cooling the city, are they helping clear the air too, and what does that mean for your health and outdoor plans today?
Clouds dominate Coimbatore’s skies today.
Coimbatore: The Coimbatore region is under a weather watch today as the sky remains overcast and the likelihood of thunderclouds increases later this morning. Expect a high of around 28 °C during the day, with skies staying cloudy until a possible thunderstorm breaks through around midday. According to the forecast, an evening shower or two may follow, after which cloud cover is predicted to reduce slightly, with the low dropping to about 22 °C tonight.
These conditions will moderate temperatures somewhat, making the day more comfortable than recent dry, hazy spells. Overall, the weather is favourable for short‑term relief, especially for people staying indoors or avoiding strenuous outdoor activity.
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Over the past week, Coimbatore recorded dry weather with fewer rain‑events and increasing fine particulate buildup, leading to hazy mornings and sluggish air movement. On the day of the Diwali celebrations (October 20, 2025), the air quality sharply worsened with AQI figures rising to around 147‑160 at locations like Kavundampalayam and the collectorate.
That spike was driven by fire‑cracker emissions, calm winds and stagnant air. Before that, the city had experienced a typical post‑monsoon pattern of cooling nights, but the lack of rain meant dust and emissions remained suspended. Now with the moisture coming in, the atmosphere is being “washed” lightly, which is a positive shift.
Chennai faces waterlogging on Diwali as heavy rain lashes city
Yes, but it’s more about aftermath and air quality than the weather itself. Traditional firecracker bursting during Diwali substantially increased particulate matter. For example, past monitoring has shown up to a 50% rise in pollution across the city on Diwali days.
Although this year Coimbatore did get some rain soon after the festival, which helped disperse pollutants, the short‑term spike in pollution still meant the air quality took a hit. So while the weather today is favourable, the diurnal effects of Diwali on air‑quality linger.
Thunderstorms expected later this morning.
With humidity rising and light rain showers occurring, airborne dust and microparticles are being suppressed. Vertical mixing of air is improving and pollutants have more chance to wash out. Real‑time AQI data shows the city entering a “moderate” pollution range, rather than “poor” or “unhealthy” status.
Still, the relief is modest and temporary—long‑term air‑quality improvement will depend on reducing traffic emissions, industrial output and festival‑day fire‑cracker use. For now, the visible change is a welcome one.
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