A week of hourly San Francisco temperature readings appears as red dots on a scatter plot, with time on the x-axis and temperature on the y-axis. The visualization uses D3 v5’s `scaleTime`, `scaleLinear`, `axisBottom`, and `axisLeft` to render an SVG chart with grid lines and axis labels. Data is loaded from a CSV via `d3.csv`, with timestamps parsed as `Date` objects and temperatures converted to numbers. Circle elements are positioned using the scales to show temperature fluctuations across the week.