Official observations from Amsterdam Airport Schiphol, the designated station for this market, confirm the highest temperature on May 3, 2026, reached 17°C around midday, with peaks of 63°F (17.2°C) amid overcast skies, light rain showers, and high humidity near 84%. This outcome aligns precisely with pre-event KNMI nowcasts and consensus from ECMWF and GFS ensemble forecast models, which projected subdued highs due to a cool maritime air mass and persistent cloud cover following warmer conditions on May 1 (23°C). May climatology typically features average highs around 16°C, providing historical context for this mild reading. Trader consensus at 100% implied probability reflects verified meteorological data; realistic challenges would require rare post hoc revisions from quality assurance processes, though preliminary reports are final in practice.