Highest temperature in Istanbul on May 28?

Prediction market odds on Polymarket reflect aggregated trader beliefs about Istanbul's May 28 high temperature and often diverge from traditional meteorological forecasts. While weather analysts rely on numerical models and historical patterns, prediction markets incorporate real-time information, trader expertise, and financial incentives. Market participants may price in tail risks or seasonal anomalies that models underweight. Comparing Polymarket odds to official forecasts from Turkey's meteorological institute or international weather services reveals whether traders are more bullish or bearish on extreme temperatures than consensus models suggest.

The market resolves on May 28, 2026, after the highest temperature in Istanbul on May 28 has been recorded. Resolution is determined by comparing the actual observed high temperature against the threshold specified in each outcome contract. Official meteorological data from Turkey's weather authority or a designated reference source establishes the final temperature reading. Once the outcome is confirmed, winning positions are paid out and losing positions expire worthless. Traders should verify the exact data source and measurement methodology before the event closes.

Several factors could shift odds on Polymarket before May 28, 2026. Major weather pattern changes—such as a heat dome, cold front, or monsoon activity—will reprice the market as updated forecasts emerge. Seasonal anomalies, El Niño or La Niña effects, and atmospheric pressure systems over the Mediterranean influence Istanbul's May temperatures. Real-time weather model updates, satellite imagery, and official meteorological advisories often trigger sharp trader repositioning. Historical May temperature records and recent years' data may also influence sentiment. As the event date nears, intraday temperature forecasts become more precise, typically causing increased volatility and trading volume.