This visualization presents a full year of synthetic weather data, combining four daily measurements into a single multi-series chart. The chart blends line series for temperature, humidity, and wind speed with a bar series for rainfall, all plotted against the day of the year. The code generates its own data using mathematical functions and randomness, then renders the chart with Chart.js on an HTML canvas element. The result provides a compact overview of seasonal trends and variability across the different weather metrics.