A smooth maroon area chart displays San Francisco temperature trends over time, with the x-axis labeled "Time" and the y-axis labeled "Temperature." The visualization loads CSV data from a Gist URL, parsing timestamps and numeric temperatures. Built with D3 v5, it uses `scaleTime`, `scaleLinear`, `area`, `curveBasis`, `axisBottom`, and `axisLeft` to render an SVG path with gridlines and axis labels. The chart is a follow-along project from a D3 course.