This dataset includes atopic dermatitis(AD) symptom, air pollution, weather data on a daily bases. The dataset was made for the analyses of the association of AD symptom in children with air pollution and weather. 177 AD patients <6 years old from the Seoul Metropolitan Area in Korea were enrolled and followed for 17 months between August 2013 and December 2014. Definition of symptom presence: Parents or guardians were instructed to record the extent of itching, sleep disturbance, erythema, dryness, oozing, and edema on a scale of 0 to 4 by using smartphone-adjusted symptom diary. The presence of AD symptoms was determined when a symptom score was 2 points or more for both itching and sleep disturbance scores, accompanied by at least 2 points of the sum of the following symptoms: erythema, dryness, edema, or oozing.