A Spline Area Chart smooths the connections between data points with curved lines instead of straight segments, producing a flowing shape while still shading the area down to the baseline. This variant makes gradual trends easier to read than a standard area chart.
This single-series example plots average monthly sunshine hours in Sydney, Australia (Jan through Dec). A crosshair aids precise hovering, markers highlight each data point, and custom Y-axis formatting appends "hrs" to every label for clear unit display.
Follow the step-by-step Area Chart Tutorial to learn how such charts are built. See the Area Chart documentation for all configuration options.