A temperature scatter plot visualizes the mean daily temperature in San Francisco as a smooth line over time, with each point representing a day in December and the early winter season. The visualization uses D3 v5 to load CSV data, apply linear scales for time and temperature axes, and render the chart as an SVG path with a curved basis line. D3’s axis generators add labeled ticks and gridlines, while the data comes from a local CSV file containing weather metrics like temperature, humidity, and wind speed.