Highest temperature in Istanbul on July 9?

Platform comparison

Market context

The underlying event is the NOAA-recorded peak temperature at Istanbul Airport on 9 July 2026, where the market resolves to the Celsius range containing the highest daily reading. Long-term averages place Istanbul’s July daytime maximum at 27°C, with 12 hours of sunshine and low humidity, though recent years show variability. Historical data indicates the area’s hottest recorded temperature at this time is 42°C, while the modal expectation for early July sits between 27°C and 31°C, making 29°C the most probable outcome under mild conditions[1][5]. The current 0% YES crowd-implied probability suggests traders are betting the temperature will fall outside the specific range being offered, likely due to confidence in the 27–31°C band.

Traders should monitor the ongoing heat wave affecting southeastern Europe, which has already pushed temperatures up to 12°C above seasonal averages in parts of Turkey, with a national record of 50.5°C logged in Silopi[4]. While Istanbul itself has seen temperatures above 40°C in major cities during this July heatwave, the airport’s location may buffer extreme spikes compared to inland regions[8]. Programmatically, a power-user would set conditional orders tied to NOAA’s real-time “Temp” column updates for site LTFM, automating entry when the reading breaches the 29°C threshold. The settlement window closes at 12:00 UTC on 9 July 2026, so dependencies include the first published data point for that date and the metric-unit toggle on the NOAA portal to ensure accurate Celsius readings[1]. No announcements are expected, but the persistence of the heat wave, predicted to last several more days, remains the key catalyst[4].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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.

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 Bot UK 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.