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Khān Shaykhūn, nestled within the Idlib Governorate of Syria, occupies a geographically complex and strategically significant position. Located at approximately 35.44°N, 36.65°E, the city sits within a gently sloping plain, part of the broader Northwestern Syrian Plateau. This plateau is characterized by rolling hills and valleys, transitioning into the more rugged terrain of the surrounding mountains to the west and northwest. The elevation averages around 510 meters (1,673 feet) above sea level, influencing local weather patterns and air circulation. The surrounding landscape is predominantly agricultural, with olive groves, vineyards, and cereal fields dominating the rural areas. This proximity to intensive agricultural practices contributes to seasonal particulate matter, particularly during harvest periods. While not directly adjacent to a major river, the Orontes River flows relatively close to the city, providing a potential moderating influence on humidity and temperature, though its impact on air quality is secondary to other factors. Historically, Khān Shaykhūn has served as a vital trading hub along routes connecting the coast to the interior, fostering a mixed urban character with both traditional residential areas and commercial zones. The urban–rural gradient is relatively sharp, with agricultural land quickly enveloping the city limits. The topography, combined with the prevailing wind patterns from the west, can lead to localized air stagnation, particularly during periods of calm weather, exacerbating the impact of any pollution sources. The region's history of conflict has also introduced unique challenges related to air quality, including the potential for industrial damage and the release of hazardous materials.

Khān Shaykhūn’s air quality experiences a distinct seasonal cycle heavily influenced by meteorological conditions and agricultural practices. Spring (March-May) generally sees improved air quality as winds increase, dispersing accumulated pollutants. However, dust storms originating from the Syrian Desert to the east can still significantly degrade air quality, particularly during March and April. Summer (June-August) is typically the most challenging period. High temperatures and prolonged periods of calm weather often lead to temperature inversions, trapping pollutants near the ground. Agricultural activities, including pesticide spraying and fertilizer application, also contribute to elevated levels of volatile organic compounds and particulate matter. Autumn (September-November) brings a gradual improvement as temperatures cool and wind patterns shift, but harvest season intensifies agricultural emissions. The burning of crop residues, a common practice, releases significant amounts of smoke and particulate matter, creating localized air pollution hotspots. Winter (December-February) can be variable. Cold, clear nights often lead to fog formation, which can trap pollutants and reduce visibility. While wind speeds generally increase during this season, periods of calm weather can still result in stagnant air and poor air quality. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should limit outdoor activity during summer afternoons and harvest periods in autumn. During dust storm events, it is advisable to remain indoors with windows closed and air purifiers activated. Maintaining good ventilation and avoiding strenuous outdoor exercise during periods of poor air quality is crucial for minimizing health risks.