This network graph visualizes weather similarity between global cities by connecting nodes with links when their temperature, pressure, wind speed, and humidity measurements are highly correlated. The graph uses d3.forceSimulation with forceLink, forceManyBody, and forceCenter to position nodes, while SVG circles and text labels represent cities. Data comes from a CSV file loaded via URL, and similarity scores are calculated using Euclidean distance normalized to a 0–1 range before filtering links above a 0.8 threshold. Nodes are colored using d3.scaleOrdinal with d3.schemeCategory10.