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Coimbatore, a major city in Tamil Nadu, sits on the Noyyal River in the Kongu region of southern India, on a plain beside the Palakkad Gap in the Western Ghats at approximately 11.02°N, 76.96°E. Its position in the rain shadow of the Ghats gives it a tropical savanna climate (Köppen Aw) — warm and comparatively dry — with a mild, breezy character unusual for the region.
Summer, from March to June, is warm to hot and dry, with April and May the hottest — highs around 35–36°C — though the Palakkad Gap channels cool breezes from the Kerala side, moderating the heat noticeably. The southwest monsoon from June to September brings modest rainfall here, far less than on the Kerala coast just across the mountains, along with gusty winds.
There is no true winter, but the cooler season from November to February brings pleasant days around 30–31°C and comfortably cool nights near 19–20°C. This is when the retreating northeast monsoon delivers the city's heaviest rainfall, in October and November, before the skies clear for a bright, mild, dry stretch that is the best time of year.
Coimbatore is relatively dry, receiving only around 650–700 mm of rain a year, because the Western Ghats shield it from the full force of the southwest monsoon; most of its rain arrives instead with the retreating northeast monsoon in October and November. Live rainfall, humidity, and pressure readings for the city are shown in the panels above.
Coimbatore owes its distinctive climate to the Palakkad Gap, a natural break in the Western Ghats that funnels cool, moist air from Kerala across the plain, giving the city refreshing breezes and milder temperatures than its inland Tamil Nadu neighbours — and the same gap generates the reliable winds that support the wind farms scattered around the region.
To follow any single measurement in Coimbatore more closely, use our live instruments: the online barometer for atmospheric pressure, the thermometer for temperature, the hygrometer for humidity, the anemometer for wind speed, the wind vane for wind direction, and the rain gauge for rainfall.