Highest temperature in Istanbul on July 22?

Platform comparison

Market context

The contract hinges on the **highest NOAA temperature at Istanbul Airport on 22 July 2026**, so the live question is whether the day’s peak lands in the very hot range or stays closer to a warm July norm. Istanbul’s July climate is typically around **29°C daytime high** with nights near **21°C**, which places the current crowd-implied **0% YES** against a summer baseline that is warm but not, by itself, extreme.[1]

That matters for cross-platform pricing because a 0% prediction-market line usually reflects either very thin liquidity or a strong assumption that the market is mis-specified, whereas sportsbook-style weather prices, where available, tend to move more with the published forecast and forecast-run consistency than with climatology alone. In practical terms, the historical frame says a single hot afternoon can still beat the monthly average, but the settlement source is the airport’s NOAA table, not citywide weather norms, so traders are really pricing a site-specific intraday maximum.[1]

What should move the number now is the late-day observation path and whether NOAA publishes the next date’s first reading only after the full 22 July record is complete, which can delay certainty even after the local day has passed. The key dependencies are the airport’s hourly readings, any forecast revisions that affect expectations for the afternoon peak, and the eventual NOAA update cadence on the LTFM timeseries page; once that next-day data point appears, the market can finally resolve.

Sources: 1

Methodology

This page reviews Highest temperature in Istanbul on July 22? 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 PolyGram, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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 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.

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.