This small multiples chart displays average wind speed by month for ten different cities, with each city’s time series shown in a separate SVG panel. The visualization uses d3.v6 to load CSV weather data via d3.csv, group records by station city using d3.group, and render each line with d3.line. A shared ordinal color scale maps cities to distinct hues, and a legend generated with the d3-legend library identifies each color. Axes are drawn using d3.axisBottom and d3.axisLeft, while hover interactions are implemented with CSS on the line dots.