The India Meteorological Department (IMD) has forecast a wet start to the new year for Chennai and its neighbouring regions, predicting above-normal rainfall for the city this January. This comes after the rainfall experienced on New Year's midnight, which may just be the beginning of a rainier-than-usual month.
IMD's Monthly Rainfall Outlook for Tamil Nadu
The IMD's monthly weather outlook indicates that most parts of north and west Tamil Nadu are likely to receive above-normal rainfall in January. This zone includes the capital city of Chennai and the adjoining districts of Tiruvallur, Chengelpet, and Kancheepuram. However, the forecast presents a contrasting picture for the broader three-month period from January to March, during which most parts of the state are expected to see below-normal rainfall.
Chennai typically receives an average of 16.2mm of rainfall in January and a cumulative average of 23.9mm from January through March. The current forecast suggests the city's January figures could exceed these averages.
Temperature Trends and Short-Term Forecast
Despite the predicted rain activity, the IMD has indicated that Chennai may experience hotter days and warmer nights this month. For Sunday, the weather department expects dry conditions to prevail over the city and its suburbs.
An IMD bulletin detailed the immediate forecast: "On Sunday, the city and neighbouring areas may experience mist or haze during early morning hours. The sky may remain partly cloudy, with temperatures ranging between a maximum of 29°C–30°C and a minimum of 23°C–24°C."
Statewide Forecast and Potential Weather System
For the rest of Tamil Nadu, the scenario is different. Most districts across the state are anticipated to record below-normal rainfall during the first three months of the year. Specifically in January, central and southern districts may see below-normal precipitation. Day temperatures in these regions are likely to remain above normal, while night temperatures could range from normal to below normal.
The IMD also noted that night temperatures may drop by 2°C–3°C in isolated pockets of Tamil Nadu until January 7. Looking further ahead, weather blogger Pradeep John pointed to a potential weather system developing. "There is a possibility of rainfall along coastal districts, including Chennai, around January 9, as a low-pressure area may form over the Bay of Bengal," John said.
This forecast suggests a month of weather contrasts for Chennai—spells of rain interrupting a pattern of generally warm temperatures, while the broader state prepares for a drier-than-usual start to the year.
