Trader consensus assigns 100% implied probability to 18°C as Warsaw's highest temperature on May 14, driven by official observations at Warsaw Chopin Airport (EPWA) confirming a midday peak of 18°C under partly cloudy skies and light southerly winds from a cool continental air mass. Recent showers through May 12–13 suppressed highs to 13°C amid a lingering low-pressure system, but today's partial clearing aligned with ECMWF, GFS, and IMGW ensemble forecasts clustering at 17–19°C, consistent with mid-May climatological norms of 18–19°C daytime highs. Evening METAR reports at 17°C indicate the peak has passed, with increasing cloud cover likely preventing further warming. Realistic challenges include unexpected late-day sunshine piercing clouds for a brief 19°C spike or minor data revisions upon finalization via Weather Underground, though model guidance shows thunderstorms capping upside potential.