India Meteorological Department observations confirm Lucknow's highest temperature reached exactly 42°C on April 20, 2026, under persistent clear skies and dry air masses that maximized solar insolation during a regional heatwave. This outcome, 3°C above seasonal norms, aligned with pre-event forecasts projecting 41–42°C amid high-pressure dominance suppressing cloud formation and winds. Trader consensus at 100% reflects real-time sensor data from the Lucknow observatory and Amausi Airport corroborating the peak, with minimal overnight cooling to 24°C. Realistic challenges would require post hoc data revisions from IMD—such as instrument recalibrations or alternative station discrepancies—but official bulletins lock in this measurement, underscoring prediction market efficiency in aggregating verified meteorological evidence.