Chennai Weather Update: Heavy Rainfall Grips Tamil Nadu This Week
Chennai, Tamil Nadu is bracing for intense rainfall this week as the Northeast Monsoon sets in with full force. According to the India Meteorological Department (IMD), heavy showers are expected today, tonight, and over the next 3 to 4 days across the region. With high humidity levels and strong winds, residents are urged to stay alert and follow safety advisories.
Today’s Chennai Rain Forecast: What to Expect
The skies over Chennai are cloudy this morning, and the IMD has issued a “Heavy Rain – Severe” watch for the city. Daytime temperatures will hover around 29°C, while nighttime lows may dip to 26°C. Rain showers are expected throughout the day, with an 88% chance of precipitation. Tonight, the rain will intensify, with a 73% chance of heavy downpours MSN Weather.
Key Weather Stats for Today:
- 🌡️ Temperature: 29°C (High), 26°C (Low)
- 💧 Humidity: 90%
- 🌬️ Wind: 8 km/h (Day), 4 km/h (Night)
- 🌧️ Rainfall Chance: 88% (Day), 73% (Night)
- 🌫️ Visibility: 4 km
- 🌞 UV Index: 1

Tonight’s Chennai Weather: Prepare for Heavy Rain
Tonight’s forecast warns of heavy rainfall across Chennai and nearby districts. The IMD suggests that the rain may cause waterlogging in low-lying areas. Wind speeds will remain moderate, but visibility may drop due to dense cloud cover. Residents should avoid unnecessary travel and stay indoors if possible.
Next 3–4 Days: Chennai Rainfall Outlook
The weather pattern over Tamil Nadu remains unstable, with widespread rain predicted until October 25. Here’s a breakdown of the forecast:
📅 October 22:
- Weather: Heavy Rain
- Rain Chance: 63% (Day), 43% (Night)
- Temperature: 30°C / 25°C
📅 October 23:
- Weather: Rain Showers
- Rain Chance: 57% (Day), 56% (Night)
- Temperature: 31°C / 25°C
📅 October 24:
- Weather: Light Rain Showers (Day), Heavy Rain (Night)
- Rain Chance: 58% (Day), 75% (Night)
- Temperature: 30°C / 25°C
📅 October 25:
- Weather: Heavy Rain All Day
- Rain Chance: 75% (Day), 73% (Night)
- Temperature: 28°C / 24°C
Sources: IMD Chennai India Meteorological Department, MSN Weather Chennai MSN Weather
Impacted Districts in Tamil Nadu
The IMD has also issued alerts for several districts beyond Chennai. These include:
- Coimbatore
- Nilgiris
- Theni
- Tenkasi
- Tiruppur
- Erode
- Dharmapuri
- Salem
- Namakkal
- Karur
- Dindigul
- Madurai
- Virudhunagar
- Tiruchirappalli
- Kallakurichi
- Tiruvannamalai
These regions may experience flash floods, landslides in hilly areas, and traffic disruptions. Travelers should check local advisories before planning trips.
IMD Advisory: Safety Tips During Heavy Rain
The IMD has urged residents to take precautions during this rainy spell. Here are some safety tips:
- Avoid walking or driving through flooded streets
- Stay updated with local news and weather alerts
- Charge mobile phones and keep emergency kits ready
- Secure loose items around homes and balconies
- Watch out for fallen power lines or trees
Flood Risk and Urban Drainage Concerns
Chennai’s urban drainage system often struggles during intense rain. With high rainfall predicted, areas like T. Nagar, Velachery, and Saidapet may face waterlogging. Authorities are working to clear stormwater drains, but residents should remain cautious.
Monsoon Dynamics: Why Is It Raining So Much?
This week’s heavy rainfall is due to the active Northeast Monsoon and a low-pressure system forming over the Bay of Bengal. The delayed withdrawal of the Southwest Monsoon has also contributed to the extended rainy season