Highest temperature in Istanbul on July 9?

Platform comparison

Market context

The underlying event is the peak daytime temperature recorded at Istanbul Airport on 9 July 2026, measured in degrees Celsius by NOAA. Current crowd-implied probability for a "YES" outcome sits at 0%, yet this contradicts historical norms where early July highs in Istanbul typically range between 27°C and 31°C[2][4]. Long-term averages place the daytime maximum at 27°C with 12 hours of sunshine, while the hottest recorded temperature in the area for this period is 42°C[3][9]. Recent heatwaves have pushed major cities like Istanbul above 40°C, suggesting that a 0% probability for any significant temperature outcome is an outlier compared to climatological data[8].

Traders should monitor the NOAA time-series release for LTFM on the settlement date, specifically the highest "Temp" column reading, as the market cannot resolve until the first data point is published[1]. Analyst consensus from Lines.com identifies 29°C as the modal expectation under mild conditions, diverging sharply from the 0% implied probability seen in some prediction markets[4]. While Polymarket currently assigns a 75% chance to 24°C and 48% to 25°C, this pricing implies a cooler day than the 29–31°C range typical for the season[1][2]. The key dependency is the official NOAA dataset availability; any delay in publication could stall resolution, making the timing of the data drop a critical catalyst for position adjustments.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is PolyGram. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.