This visualization plots daily temperature readings in San Francisco over time as a red scatter plot, with temperature on the y-axis and timestamps on the x-axis, overlaid on a light gray SVG background. It uses D3 v5 with `d3.scaleTime` and `d3.scaleLinear` for the axes, while `d3.axisLeft` and `d3.axisBottom` render gridlines and tick labels. Circles are appended via data joins, and the data comes from a CSV file hosted on GitHub, loaded with `d3.csv`.