This visualization shows how temperatures in San Francisco vary over time, with each orange circle representing a daily temperature reading plotted against its timestamp. The chart uses D3 v5 with an SVG renderer, employing d3.scaleTime and d3.scaleLinear for axes, d3.axisBottom and d3.axisLeft for grid lines, and d3.extent to set domains. Data is loaded from a CSV file, with timestamps parsed and temperatures converted to numbers before rendering.