Trader consensus on 21°C as Ankara’s highest temperature today stems from consistent official forecasts and station observations under partly to mostly cloudy skies with light northeasterly winds. Meteorological models, including those from the Turkish State Meteorological Service, project a daytime maximum near 21–22°C as a stable high-pressure pattern limits daytime heating, consistent with historical late-September averages for the region. Real-time data from Esenboğa Airport and urban stations show temperatures climbing to the low 20s before stabilizing, supporting the market’s near-certain implied probability. Only an unforecasted surge in solar heating from unexpected clear skies or measurement revisions could shift the outcome, though current conditions and model agreement make such changes improbable before resolution.