Currently submitted to: JMIR Dermatology
Date Submitted: Feb 16, 2026
Open Peer Review Period: Feb 26, 2026 - Mar 20, 2026
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Climate, Humidity, and Population-Level Interest in Dry Skin: A Google Trends Analysis Across the United States
ABSTRACT
Background:
Climate and weather factors of temperature and humidity are widely reported triggers of xerosis (dry skin), a common inflammatory skin condition and frequent driver of pruritus (itchy skin) and reduced quality of life. Growing evidence supports links between environmental conditions and skin barrier function, with extreme climates associated with increased atopic dermatitis–related clinical visits. Mechanistically, temperature and humidity affect the stratum corneum, the skin’s primary permeability barrier, with low humidity and high temperature increasing transepidermal water loss and promoting cutaneous inflammation. This study examines the relationship between climate, namely temperature and humidity, and the general public’s experience in dry skin and moisturizing products, throughout the United States.
Objective:
This study sought to address gaps in traditional epidemiologic approaches by linking climate conditions with population-level online search behavior related to dry skin and moisturizer use across the United States. Publicly available climate data were obtained from the National Oceanic and Atmospheric Administration (NOAA), including average temperature and dew point by state over a recent nine-year period (2016–2025). Dew point served as a proxy for ambient humidity. Google Trends was used to assess relative search interest for five dry skin– and moisturizer-related terms by state during the same period. Search interest was normalized per million residents, and associations between climate variables and search interest were evaluated using linear regression analyses.
Methods:
Publicly available climate data were obtained from the National Oceanic and Atmospheric Administration (NOAA), including average temperature and dew point by state over a recent nine-year period (2016–2025). Dew point served as a proxy for ambient humidity. Google Trends was used to assess relative search interest for five dry skin– and moisturizer-related terms by state during the same period. Search interest was normalized per million residents, and associations between climate variables and search interest were evaluated using linear regression analyses.
Results:
Lower average temperatures and lower dew points were associated with higher dry skin–related search interest, while warmer, more humid states showed lower interest. Both temperature and dew point demonstrated significant negative associations with Google search interest.
Conclusions:
Population-level search behavior related to xerosis reflects climate-related dermatologic burden nationally patterns.
Citation
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