This radar chart displays monthly average temperature anomalies for Massachusetts, using a circular layout where months are plotted around the circumference and anomalies extend from the center. Users can select a year via a range slider to update the visualization. Built with D3 v7 and React, the chart uses `scaleTime` for the angular axis and `scaleLinear` for the radial distance, with a color gradient from red to blue indicating anomaly magnitude. Data comes from a CSV file containing temperature records from 1895 onward.