Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Prediction Today) Pick polygram.ink (preferred broker) |
98% | 2% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
98% | 2% | 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 |
|---|---|
| 38°C | 98% |
| 39°C | 2% |
| 32°C or below | 0% |
| 33°C | 0% |
| 34°C | 0% |
| 35°C | 0% |
| 36°C | 0% |
| 37°C | 0% |
| 40°C | 0% |
| 41°C | 0% |
| 42°C or higher | 0% |
Market context
Shanghai is bracing for a hot, humid day with rain expected, as the city’s highest temperature on 16 July 2026 is currently forecast to reach 36°C at Pudong International Airport, with a 90% probability of precipitation and scattered afternoon showers [3][6]. The 0% crowd-implied probability for any outcome above this threshold reflects the immediate meteorological reality: heavy cloud cover, high humidity at 84%, and rain likely to suppress peak temperatures well below historical extremes [2][6].
Historically, July in Shanghai sees daytime highs between 30–38°C, with rare spikes to 40°C in extreme years, but such events are uncommon and typically occur under clear, dry conditions rather than the wet, muggy pattern now in place [7]. The current 36°C forecast aligns with the average high of 33°C (93°F) for the month, suggesting the market’s pricing is consistent with typical mid-July behaviour rather than outlier heat [1][7].
Traders should monitor hourly updates from Wunderground and local aviation reports for any sudden shifts in cloud cover or wind direction, which could alter the day’s peak temperature [2]. A key catalyst is the 80% chance of precipitation and expected 1–3mm of rain, which will likely cap temperatures unless a dry break occurs in the afternoon [3][6]. With the settlement window closing at 12:00 UTC, real-time data from the Pudong station will be decisive in confirming the final resolution.
Methodology
We track Highest temperature in Shanghai on July 16? 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
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
- 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 Prediction Today. 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.
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