Recent numerical weather prediction runs from models like GFS and ECMWF indicate a stable high-pressure regime over Istanbul, with clear skies and light northeasterly winds favoring moderate nocturnal radiative cooling. Forecast minimum temperatures for September 1 cluster tightly between 19–21°C, consistent with the near-even market-implied probabilities for 19–22°C outcomes. This reflects typical early-September climatology under a warm, dry air mass, where the daily minimum depends on precise timing of the pre-dawn low, local urban heat-island effects, and minor variations in boundary-layer moisture. No significant synoptic changes or frontal passages are expected before resolution, limiting downside risk to sub-18°C readings while capping upside potential from persistent daytime heating. Updated model guidance ahead of the event will likely narrow trader consensus around these thresholds.