This lab is about visualizing quantities over time.
In this graph we used two shades of the same color to represent the maximum/minimum temperature evolution over a given year. The average is instead plotted via scatter plot. On hover on the legend labels, we can see just one isolated year.
The radarchart (often called spiderchart given the shape) can emphatize the "cyclicity" of the domain, so it is perfect to show the evolution of the temperatures over the months, each of those representing a vertices. In this case, Polygons with a lager area will correspond to hotter years than the other ones. Of course, the bottom part of the plot will "weigh" more since the summer period is located there. The mouseover action here also works on vertices.
A Ridgeline graph shows multiple distributions with a comparable domain. The continuous "wavy" shape is usually obtained via kernel-density estimation from a discrete set of observations. In this case, we visualize the minimum and maximum temperature for each month with different colors. One can choose to plot different years aggregated by chosing multiple years with the checkboxes