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Coria, nestled in the heart of Extremadura, Spain, occupies a strategic position within a landscape sculpted by millennia of fluvial activity. Situated at approximately 39.98°N, -6.54°W, the city’s geography is dominated by the Sierra de Coria mountain range to the north, providing a natural barrier and influencing local weather patterns. The landscape surrounding Coria is predominantly agricultural, characterized by extensive olive groves, cereal fields, and vineyards, a typical feature of the Extremaduran Meseta. The Guadiana River, a vital waterway, flows nearby, though not directly through the urban area, impacting humidity levels and contributing to localized microclimates. Coria’s elevation, around 550 meters above sea level, contributes to cooler temperatures and can exacerbate temperature inversions, particularly during winter months. The urban fabric itself is compact, retaining a medieval character with narrow, winding streets, reflecting its historical importance as a fortified settlement. While Coria is relatively isolated from major industrial belts, its proximity to agricultural areas means that seasonal agricultural practices, such as burning crop residue, can contribute to localized air pollution episodes. The urban–rural gradient is gradual, with agricultural land seamlessly blending into the town’s periphery. The surrounding terrain, a mix of rolling hills and plains, generally promotes good air circulation, though this can be disrupted by the aforementioned inversions and the occasional stagnant weather conditions. The region's climate, a continental Mediterranean type, further shapes the city's air quality profile.

Coria’s air quality experiences a distinct seasonal rhythm dictated by its continental Mediterranean climate. Spring (March-May) typically brings the most favourable conditions, with increasing temperatures and prevailing winds dispersing any accumulated pollutants. However, pollen levels rise significantly, impacting those with allergies. Summers (June-August) are generally dry and hot, with stagnant air masses occasionally leading to elevated levels of ozone, a secondary pollutant formed by sunlight reacting with vehicle emissions and other volatile organic compounds. The lack of rainfall during these months can exacerbate this issue. Autumn (September-November) sees a return to more dynamic weather patterns, with increased rainfall helping to cleanse the atmosphere. Agricultural burning, a traditional practice, can, however, contribute to particulate matter pollution during this period, particularly in October and November. Winter (December-February) presents the greatest air quality challenges. Cold, stable air masses frequently lead to temperature inversions, trapping pollutants close to the ground. Fog, common during these months, further reduces air circulation and concentrates emissions. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should limit outdoor activity during periods of prolonged fog or temperature inversions. While Coria lacks heavy industry, local traffic and agricultural practices remain key contributors to air pollution. Maintaining vehicle maintenance and minimizing burning activities are crucial for mitigating air quality impacts. The dry conditions of summer necessitate careful management of potential ozone precursors.