Official temperature observations from KNMI stations in Amsterdam have recorded a daily maximum of exactly 20°C on October 3, locking in the market outcome at 100% implied probability. This aligns with the latest high-resolution forecast runs from the European Centre for Medium-Range Weather Forecasts and local models, which showed stable autumn conditions with limited diurnal warming under partly cloudy skies and light northerly flow. Historical October averages for the city hover near 15–16°C, making today’s reading an above-normal but not extreme outlier. Minor revisions remain possible if post-processing quality checks adjust station data, though such changes are rare once preliminary maxima are confirmed. No further updates are expected before market resolution.