Wind, rain and cold suppress scoring in outdoor sports in measurable, well-studied ways — a 20 mph crosswind is worth several runs in baseball and several points in football. Stadium-level forecasts update far more often than betting markets reprice. You pull a forecast for the exact venue, apply a scoring adjustment fitted on historical games in comparable conditions, and trade the total and outcome markets that have not moved with the weather.
Markets on Polymarket where weather-adjusted totals for outdoor games is the natural play: