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Dayr Abū Sa‘īd, nestled within the Irbid Governorate of Jordan, occupies a compelling geographic position in the northern highlands. Situated at coordinates 32.5025°N, 35.6922°E, the city benefits from an elevation of approximately 600 meters above sea level, contributing to a relatively temperate climate. The surrounding landscape is characterised by rolling hills and fertile agricultural land, typical of the Jordanian Highlands. This region is a crucial breadbasket for the country, with extensive olive groves and wheat fields dominating the rural areas immediately surrounding Dayr Abū Sa‘īd. The city’s urban-rural gradient is fairly sharp, transitioning quickly from residential areas to agricultural zones. While not directly adjacent to a major body of water, the proximity to the Jordan Valley influences regional weather patterns. The prevailing winds, often originating from the Mediterranean, carry moisture and can contribute to localised fog formation, particularly during cooler months. Industrial activity is relatively limited within Dayr Abū Sa‘īd itself, but the broader Irbid Governorate hosts some smaller-scale manufacturing and agricultural processing facilities. This combination of agricultural practices, limited industry, and topographic features significantly shapes the city’s air quality profile, creating potential for both localised and regional pollution sources. The hilly terrain can also trap pollutants, exacerbating air quality issues during periods of calm weather.

Dayr Abū Sa‘īd experiences a Mediterranean climate with distinct seasonal variations impacting air quality. Spring (March-May) brings increased agricultural activity – ploughing and fertiliser application – leading to a rise in particulate matter, especially PM10. Gentle breezes can offer some dispersion, but temperature inversions are common in the valleys, trapping pollutants. Summers (June-August) are typically dry and hot, with stable atmospheric conditions. Dust storms originating from the Syrian Desert are a significant concern, dramatically reducing visibility and increasing PM10 levels. September and October offer a brief respite with cooler temperatures and occasional rainfall, washing away accumulated pollutants. Autumn is generally the period with the best air quality. Winter (November-February) sees increased reliance on heating, often utilising wood or diesel, contributing to elevated levels of sulphur dioxide and particulate matter. Rainfall, while cleansing, can also lead to increased humidity and fog, trapping pollutants near the ground. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during dust storms and periods of high heating demand. November through February are particularly challenging months. Avoiding strenuous activity during peak pollution times and utilising air purifiers indoors are recommended preventative measures.