Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Prediction Today) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 34°C or higher | 100% |
| 24°C or below | 0% |
| 25°C | 0% |
| 26°C | 0% |
| 27°C | 0% |
| 28°C | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
Market context
The immediate shift in the last 24–48 hours is that Istanbul has stayed firmly in midsummer heat, but not in the extreme range seen further south; the latest airport reporting still shows a hot afternoon reading near 32°C at nearby Atatürk Airport, while broader July guidance for the city points to daytime highs clustered around the high 20s to low 30s Celsius. [1][2][10] That leaves the market anchored to a fairly tight band unless a sharp convective spike or a late-day surge develops at Istanbul Airport before the NOAA table closes.
Historically, July in Istanbul is hot, dry and relatively stable rather than record-breaking, with average daytime highs around 27–29°C and only a handful of rainy days across the month. [2][7][10][12] Comparable heat guides say short-lived heatwaves can lift temperatures into the mid-to-high 30s Celsius, but that is still above the usual baseline rather than the norm, so a zero-implied probability is broadly consistent with a market that currently expects the eventual maximum to land in one of the lower temperature bins rather than a genuinely high outlier. [6][11][12]
The main catalysts traders should watch today are the airport observations themselves, because settlement depends on the highest NOAA “Temp” reading at Istanbul Airport and the market cannot resolve until the next day’s first data point is published. [Market description] That means the important variables are the remaining afternoon and evening updates, any local marine-breeze or inland-heating effects, and whether a late thunderstorm or cloud cover caps the day’s maximum; recent Turkey-wide reporting also notes a cooling system moving into the Marmara region from 22 July, which could trim the ceiling even if Istanbul stays warm. [3]
Methodology
This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Prediction Today, which mirrors the Polymarket order book directly.
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
- 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.
- Do I need to KYC for this market?
- On Polymarket directly, no — it's wallet-based. Intermediary brokers like Prediction Today 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.
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