This diverging bar chart displays average December 2016 temperatures for various station cities, with each horizontal bar extending left or right from a central zero axis to show below- or above-freezing values. The bars are colored using a sequential red-blue interpolator (`d3.scaleSequential` with `d3.interpolateRdBu`), ranging from blue for cold to red for warm temperatures. The visualization loads weather data via `d3.csv` and renders as SVG, using `d3.scaleBand` for the city axis, `d3.axisBottom`, `d3.axisLeft`, and `d3.axisRight` for ticks, and the external `d3.legend` library’s `d3.legendColor` for a color scale legend. Hovering over a bar turns it red.