Аннотация:A correlation analysis of seasonal values of parietal edema of the paranasal sinus mucosa was carried out according to computed tomography data in patients (504 people) without pathology of ENT organs, volumetric processes of the brain, injuries of the facial skeletonwho were treated in various departments of the State Medical Institution "City Hospital№ 40" (Sestroretsk) with a UV index and basic meteorological indicators for the period of2019. The correlation of cases of parietal edema of the paranasal sinus mucosa with seasonalchanges in the UV index (r~ 0.75), relative humidity (r~ -0.87) and wind speed (r~ -0.64) wasrevealed.