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Leganes is situated on the western coast of Panay Island within the province of Iloilo, serving as a vital transition zone between the dense urban core of Iloilo City and the sprawling agricultural landscapes of central Visayas. The municipality is characterized by its low-lying, relatively flat coastal topography, which is heavily influenced by its proximity to the Guimaras Strait. This coastal positioning plays a decisive role in the local atmospheric dynamics, as the town experiences regular sea-land breeze cycles that facilitate the dispersion of local pollutants. The terrain is a mosaic of verdant rice paddies, sugar cane plantations, and emerging residential developments, creating a distinct urban-rural gradient. While Leganes lacks the heavy industrial belts found in larger metropolitan hubs, its geographic position makes it a corridor for commuters traveling toward Iloilo City, introducing vehicular emissions along its primary arterial roads. The elevation remains modest, which prevents the formation of complex mountain-valley wind systems but allows for horizontal air movement driven by maritime influences. The presence of extensive agricultural zones means that seasonal biomass burning can occasionally introduce particulate matter into the air, particularly during harvest periods. Consequently, the air quality in Leganes is a product of its maritime setting, its role as a suburban residential hub, and the seasonal agricultural cycles that define the Panay landscape. This interplay between salt-laden maritime air and terrestrial emissions shapes the unique atmospheric profile of this Ilonggo municipality, where nature and human activity constantly coexist in a delicate, ever-changing balance of tropical environmental dynamics.

In the tropical climate of Leganes, the air quality narrative is dictated by the alternating cycles of the dry and wet seasons rather than traditional temperate seasons. During the dry season, which typically spans from late November to May, air quality can experience periodic fluctuations. The Amihan, or northeast monsoon, brings cooler, cleaner air from the north, often improving visibility and dispersion. However, during the hotter months of March and April, stagnant air conditions and temperature inversions can trap local vehicular emissions and smoke from agricultural biomass burning, leading to localized peaks in particulate matter. This is a period when sensitive individuals, such as those with respiratory conditions, should limit prolonged outdoor exertion, especially during the midday heat. Conversely, the wet season, characterized by the Habagat or southwest monsoon from June to October, generally fosters much cleaner air. Frequent rainfall acts as a natural scrubbing mechanism, washing aerosols and particulates out of the atmosphere, while the heavy winds associated with monsoon depressions ensure rapid dispersion. While the humidity is higher, the air is often fresher. For outdoor enthusiasts, the post-monsoon months often provide the most pleasant conditions. During the peak of the dry season, residents should monitor local conditions and perhaps avoid strenuous activities during the late afternoon when heat and stagnant air might converge. Overall, Leganes benefits from its maritime-influenced weather, which largely mitigates the prolonged smog episodes common in more landlocked, heavily industrialized urban centers. Maintaining health awareness during these seasonal shifts is essential for all community members.