Highest temperature in Istanbul on July 22?

Platform comparison

Market context

Istanbul Airport’s peak temperature on 22 July is trading like a short-priced favourite around **31°C**, with a smaller slice of the book on **32°C** and the market effectively pricing the higher bands as underdogs. The implied probability of **0% YES** for any broader market framing looks inconsistent with the internal outcome distribution, where consensus is concentrated in a narrow range rather than in a truly cold or extreme-heat tail.[1]

Historically, these airport-temperature markets tend to resolve in line with the day’s synoptic pattern, with the highest reading often landing close to the middle of the afternoon range unless a sea breeze, cloud shield, or a late-day surge shifts the top print. That means the handicapper’s read is less about calling a dramatic outlier and more about whether the forecast stack is underestimating a modest warm-up into the low 30s. On current pricing, **31°C** looks like the favourite, while **32°C** is the main value-style contrarian if conditions run a touch hotter than expected.[1]

The key catalyst is the NOAA Istanbul Airport timeseries itself, because the market resolves on the highest value shown under **Temp** for the day, and it cannot settle until the next day’s first data point is published. Traders should watch the late-afternoon and evening updates for any upward revision in the day’s maximum, since even a single additional Celsius point can shift the resolution band. The NOAA page is the only source that matters for settlement, so consensus forecasts are secondary to the published airport observations.[1]

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 Who Will Win, 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 Who Will Win. 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.