This example visualizes temperature readings over time from a dataset of weekly San Francisco weather. The SVG chart plots each data point as a circle, with a time-scaled x-axis and a linear y-axis for temperature. Built with React and D3 v5, the code uses `scaleTime`, `scaleLinear`, and `extent` to map data to coordinates, while the custom `AxisBottom`, `AxisLeft`, and `Marks` components render the axes and circles. Tooltips display the day of each timestamp using `timeFormat`.