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Rafsanjan, situated in Iran's Kerman province at an elevation of approximately 1,500 meters, occupies a strategic position within the vast, arid interior of the Iranian plateau. Nestled between the rugged Zagros mountain ranges to the west and the central desert basins, the city is defined by its semi-arid climate and extensive agricultural footprint. The surrounding landscape is dominated by vast pistachio orchards, which serve as the economic backbone of the region and influence the local microclimate through evapotranspiration. However, these orchards are often fringed by barren, saline desert plains that are highly susceptible to wind erosion. The city’s urban character is a blend of historic desert architecture and modern industrial expansion, particularly linked to the nearby copper mining complexes. Geographically, Rafsanjan sits in a basin-like depression, which creates a natural trap for particulate matter. The proximity to the Lut Desert and the expansive salt flats of the region means that wind-borne dust is a constant environmental factor. During the summer months, intense solar radiation heats the desert floor, triggering convective currents that lift fine silts into the atmosphere. The urban-rural gradient is stark, as the city transitions abruptly from dense, concrete-heavy residential zones into sprawling, irrigated green belts. This juxtaposition creates complex thermal dynamics, where urban heat islands exacerbate the concentration of pollutants. Consequently, the city's air quality is heavily dictated by the interplay between regional dust storms, agricultural dust from disturbed soils, and the industrial emissions from the Kerman province's heavy mining and smelting operations located in the surrounding mountains.

Rafsanjan experiences a climate where air quality is dictated by the dramatic shifts between seasonal wind patterns and temperature inversions. During the spring, the city is frequently subjected to high-velocity winds sweeping across the Kerman plains, which mobilize loose desert sands and topsoil from fallow pistachio orchards, leading to elevated concentrations of particulate matter. Outdoor activities during these months are best restricted to early mornings before wind speeds peak. Summer brings intense heat, which, while reducing the frequency of thermal inversions, creates localized dust devils and ozone formation due to high solar radiation levels interacting with vehicular emissions. Sensitive groups, particularly those with respiratory conditions, should prioritize indoor environments during the peak heat of the afternoon when ozone levels are typically at their zenith. As autumn arrives, the cooling temperatures frequently induce nocturnal temperature inversions. During this period, the cool air settles in the basin, trapping pollutants emitted from local traffic and heating systems close to the ground, leading to stagnant air conditions that can persist until mid-morning. Winter remains the most challenging season for air quality stability. While precipitation occasionally cleanses the atmosphere, long stretches of clear, cold nights foster severe inversions that concentrate nitrogen dioxide and particulate matter. Residents are advised to monitor local meteorological reports during these months, as the combination of low wind speeds and cold air creates a stagnant envelope over the city. Favoring outdoor exercise during the late afternoon in winter can help avoid the worst of the morning inversion-related pollution spikes typical of the urban core.