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Ayungon sits on the eastern coast of Negros Oriental, nestled along the shores of the Tañon Strait. Its geography is characterized by a narrow coastal strip that opens into rolling hills and volcanic uplands. As a predominantly agricultural municipality, the urban character is fragmented, with residential clusters interspersed among vast fields of sugarcane and coconut plantations. The elevation remains relatively low near the coast, though it rises sharply toward the interior of Negros island. This specific positioning creates a dynamic air quality profile. The proximity to the Tañon Strait ensures a consistent influx of maritime breezes, which act as a natural ventilation system, sweeping away localized pollutants and maintaining a fresh coastal atmosphere. However, the urban-rural gradient is marked by a critical artery—the main highway—where vehicle emissions concentrate in a narrow corridor. The surrounding agricultural zones contribute a different set of challenges; the periodic burning of crop residues, particularly sugarcane trash, can lead to transient spikes in particulate matter. Because the town is cradled between the mountains and the sea, certain weather patterns can trap these emissions near the surface, though the overall air quality remains significantly cleaner than in highly industrialized urban centers like Dumaguete. The synergy between the maritime influence and the lush green canopy of the interior creates a breathable environment, provided that seasonal agricultural practices are managed to minimize smoke. This balance of oceanic air and inland vegetation defines the respiratory health of the region, making its air quality highly dependent on seasonal winds and topography.

Ayungon experiences a tropical climate divided into the dry season and the wet season, each exerting a distinct influence on air quality. From December to May, the dry season dominates, often characterized by the Amihan, or northeast monsoon. During these months, the air is generally clear, but the lack of precipitation allows particulate matter from road dust and agricultural activities to linger. The peak of pollution often coincides with the sugarcane harvesting period, when biomass burning is common. Smoke from these fields can settle in the low-lying coastal areas, particularly during early morning temperature inversions when cool air traps pollutants near the ground. Consequently, sensitive groups, including children and the elderly, should limit outdoor exertion during peak burning hours in February and March. Conversely, the wet season, spanning June to November, is driven by the Habagat, or southwest monsoon. This period is characterized by frequent rainfall and high humidity, which effectively scrub the atmosphere of airborne particulates through wet deposition. The heavy rains wash away dust and neutralize smoke, resulting in the cleanest air of the year. However, the increased humidity can exacerbate respiratory conditions for those with asthma. Outdoor activities are most favorable during the rainy months, though monitoring for sudden storm surges is necessary. For residents, the transition months of May and November represent shifts in wind patterns that can either clear or concentrate pollutants depending on the prevailing wind direction and local agricultural cycles. This rhythmic alternation ensures a seasonal cleansing of the air, maintaining an ecological balance.