Guadalupe is an integral component of the Monterrey Metropolitan Area in northeastern Mexico, situated at coordinates 25.6775°N, -100.2597°W within the state of Nuevo León. This urban municipality lies at approximately 500 meters above sea level in the Santa Catarina River valley, nestled between the Sierra Madre Oriental mountain ranges to the west and south, which create a natural basin that significantly influences local air quality patterns. The city's geography features a predominantly flat to gently rolling terrain that transitions into rugged foothills, with the Santa Catarina River—often seasonal—flowing through its urban core. Guadalupe's position immediately east of Monterrey places it within one of Mexico's most important industrial corridors, characterized by manufacturing plants, cement production facilities, and automotive industries that contribute substantially to particulate matter and ozone formation. The urban-rural gradient shows dense residential and commercial development in central areas, gradually giving way to peri-urban zones with mixed land use. Proximity to the Cerro de la Silla mountain to the east and the Sierra Las Mitras to the west creates topographic constraints that limit atmospheric dispersion, particularly during temperature inversion events. While no major bodies of water moderate the local climate, the region's semi-arid conditions and basin geography combine to trap pollutants, especially when combined with urban heat island effects from extensive paved surfaces and limited green spaces in the built environment.

Guadalupe's air quality follows distinct seasonal patterns shaped by its semi-arid climate and topographic constraints. During winter (December-February), cold, stable atmospheric conditions frequently create temperature inversions that trap pollutants near the surface, particularly overnight and early morning when winds are calm. This season often sees elevated levels of PM2.5 and PM10 from increased residential heating and industrial emissions, making mornings the least favorable time for outdoor activity. Spring (March-May) brings warmer temperatures and stronger daytime winds that improve dispersion, though occasional dust storms from the surrounding arid landscape can temporarily spike particulate levels. Summer (June-August) features the highest solar radiation intensity, driving photochemical reactions that produce ground-level ozone, especially during afternoon hours when temperatures exceed 30°C. The rainy season from late summer through early fall (July-September) provides natural cleansing through precipitation, though humidity can occasionally combine with pollutants to create haze. Autumn (October-November) typically offers the most favorable conditions with moderate temperatures, adequate ventilation, and reduced industrial activity during holiday periods. Sensitive groups including those with respiratory conditions, children, and older adults should monitor daily air quality reports, limit strenuous outdoor activities during pollution episodes, and consider using air purifiers indoors during peak winter inversion periods and summer ozone formation hours.