Pronóstico: Highest temperature in Istanbul on July 4?

Platform comparison

Market context

The underlying real-world event is the highest temperature recorded at Istanbul Airport on 4 July 2026, measured in degrees Celsius by NOAA. Current Polymarket pricing shows the contract at 0% YES for the 25°C range, implying the crowd believes the temperature will almost certainly exceed this threshold. This stark probability aligns with long-term historical data, where Istanbul’s mean maximum on 4 July typically runs between 27°C and 29°C, rarely dipping below 25°C even in cooler years [2]. Recent climate trends further support this, as Istanbul has experienced a notable increase in daily highs, with average July temperatures now hovering around 26.9°C nationally and daily peaks frequently reaching 85°F (29.4°C) [1][9].

Traders should monitor the immediate heatwave patterns affecting Turkey, as the nation recently recorded its highest-ever temperature of 50.5°C in Silopi during a severe July heatwave, signalling extreme thermal conditions across the region [3][7]. While Istanbul is not as arid as southeastern Turkey, the broader atmospheric pressure systems driving these records could elevate local temperatures beyond seasonal norms. Key catalysts include NOAA’s daily data releases for Istanbul Airport, which will confirm the “Temp” column readings once published, and any official meteorological announcements regarding sustained high-pressure ridges over the Aegean [2]. The settlement window closes on 4 July 2026 at 12:00 UTC, meaning the first data point for that date must be publicly available before resolution occurs [2]. On-chain mechanics remain straightforward: USDC trades on Polygon using conditional tokens, with liquidity locked until the NOAA source confirms the final temperature range.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Pronóstico: Highest temperature in Istanbul on July 4? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Polymarket Qué Es, which mirrors the Polymarket order book at 0% fees.

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

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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 fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Qué Es trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.