A radar chart displays monthly temperature anomalies for a selected year, using a radial time scale for months and a linear scale for anomaly values. A color scale maps anomaly magnitude, from blue for cooler to red for warmer conditions. A slider menu lets viewers choose the year. The visualization uses D3 v7’s `scaleTime`, `scaleLinear`, `lineRadial`, and `scaleSequential` with the `interpolateRdBu` color scheme, rendering points and a connected path via SVG. Data comes from Massachusetts temperature records spanning 1895 to 2022.