Villianur enjoys a tropical wet and dry climate, characterized by a hot summer and a distinct monsoon season.
* **Air Quality**: Generally ranges from Good to Moderate (AQI 40-80). The absence of heavy polluting industries keeps the air relatively clean compared to massive Indian metropolises. * **Water Bodies**: The area's ecology is closely tied to the nearby **Ousteri (Ossudu) Lake**, recognized as an Important Bird Area (IBA) by the Bombay Natural History Society. It is a vital wetland that supports migratory birds. * **Agriculture & Greenery**: Historically an agricultural hub, Villianur retains patches of paddy fields and coconut groves, though rapid urbanization is shifting the landscape. * **Sustainability**: Local environmental efforts are increasingly focused on reducing single-use plastics and protecting the fragile wetland ecosystems surrounding the town.