**Official observations from Helsinki-Vantaa Airport and the Finnish Meteorological Institute confirm a daytime maximum of 16°C on September 27, 2026, under predominantly clear skies with moderate westerly winds.** This aligns precisely with the market's 100% implied probability for that outcome, as real-time station data and model consensus converged on mild late-September conditions near the 1991–2020 climatological average high of 13.2°C. Clear atmospheric conditions and a stable high-pressure influence prevented any significant warming or cooling deviations. Only an unexpected post-observation data correction or use of an alternate station threshold could realistically alter resolution, though historical verification practices make such shifts improbable.