This visualization displays temperature fluctuations in San Francisco over a week, using a line chart with data points rendered as circles to highlight individual measurements. The chart is built with React and D3 v7, using `scaleTime` for the x-axis and `scaleLinear` for the y-axis, while `line` with `curveNatural` draws the smoothing path. The SVG output includes axis ticks, labels, and formatted tooltips showing temperature in Celsius, styled with custom CSS.