Last 7 days
Today
28° / 25° High / Low (°C)
99% Humidity
100% Rain probability
Rain showers Condition
~23h Rain duration
What this means
In Chennai on 21 Oct 2026, rain is expected: 100% chance, up to 23.5 mm forecast (source: Open-Meteo).
Scattered showers is expected today for around 23 hours — 100% probability, up to 23.5mm forecast. An umbrella is the right call.
Rain season
Chennai's primary rain comes from the northeast monsoon October–December, making it unusual among Indian cities where the southwest monsoon dominates. Cyclones forming in the Bay of Bengal are a real risk October–November and can bring extreme rainfall in short windows. The southwest monsoon (June–September) passes mostly to the west, leaving Chennai relatively dry.
Elsewhere in India