Highest temperature in Istanbul on July 4?

Platform comparison

Market context

The real-world event centres on NOAA’s highest temperature reading at Istanbul Airport on 4 July 2026, with the market currently pricing a 0% chance that the result falls in the lowest temperature range. Historical data frames this probability sharply: Istanbul’s July 4 mean maximum typically runs between 27°C and 29°C, while ensemble forecasts from global models suggest a likely settlement near 25–27°C under northerly flow[1][3]. Recent extreme heat in Turkey, including a national record of 50.5°C last July, underscores volatility but does not contradict the baseline expectation that temperatures will exceed the lowest bracket[4][9].

A power-user approaching this programmatically would monitor NOAA’s time-series feed for LTFM, toggling to metric units to capture the “Temp” column’s peak value[1]. Key catalysts include shifts in regional wind patterns, solar irradiance levels (which remain near 7.7 kWh in July), and any official announcements on heatwave advisories from Turkish meteorological authorities[2]. Traders should also watch for updates from EU climate scientists, who recently confirmed July 2025 as Earth’s third-hottest on record, a trend that may influence 2026 conditions[4]. Conditional orders could be triggered if real-time data deviates significantly from the 25–27°C forecast band.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Istanbul on July 4? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

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.

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.

Do I need to KYC for this market?

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

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.