Highest temperature in Istanbul on July 4?

Platform comparison

Market context

The underlying event is the peak daily temperature at Istanbul Airport on 4 July 2026, measured in degrees Celsius by NOAA. Current crowd-implied probability for a specific 25°C threshold sits at 0%, yet historical data frames this as an outlier. Long-term averages for Istanbul’s 4 July show mean maximums consistently running between 27°C and 29°C, rarely dipping below 25°C [2]. Recent July weather in the city confirms daily highs typically climb from 82°F to 85°F (28°C to 29°C), rarely falling below 75°F (24°C) [1]. While Turkey recently recorded an unprecedented national high of 50.5°C in Silopi during a heatwave, that extreme occurred in the far southeast, not Istanbul [3][4]. Istanbul’s climate has seen rising daily highs, but its warmest month remains August, averaging 23–24°C, suggesting July 4 is already near its seasonal peak [5].

Traders should monitor real-time NOAA updates for the Istanbul Airport site (LTFM) as the settlement window closes, specifically the highest reading under the "Temp" column for all times on 4 July [2]. The primary catalyst is the official publication of the first data point for this date, which triggers resolution [2]. No major coaching changes or key absences apply here, as this is a weather event, but traders must watch for sudden shifts in solar radiation or cloud cover, which directly influence peak temperatures. Recent reports confirm Türkiye experienced its hottest July in 55 years, with average temperatures reaching 26.9°C, indicating a strong upward trend that could push Istanbul’s 4 July reading above historical norms [9]. The dependency is strictly on the NOAA dataset; any delay in data publication will postpone resolution.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Sports-specific comparison page for Highest temperature in Istanbul on July 4?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.

Resolution & payout

Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.

FAQ

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