A scatter plot displays temperature readings over one week in San Francisco, using the Data Canvas Sense Your City dataset. Each circle represents a temperature measurement at a specific timestamp, with time on the x-axis and temperature on the y-axis. The visualization is built with React and D3 v5, using `d3.scaleTime` and `d3.scaleLinear` for the axes and `d3.csv` for data loading. SVG circles render the marks, while native browser tooltips appear on hover via the `<title>` element.