Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Best Prediction Markets) 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 |
|---|---|
| 36°C | 100% |
| 30°C or below | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
| 34°C | 0% |
| 35°C | 0% |
| 37°C | 0% |
| 38°C | 0% |
| 39°C | 0% |
| 40°C or higher | 0% |
Market context
Shanghai’s airport reading on 24 July is set to land in the hot end of the summer range, with current forecasts clustering around the mid-30s Celsius for the city and nearby Pudong area. Temperatures.com has Shanghai at a **95°F (35°C)** high for Friday, while Weather.com points to a high near **95°F** with showers and thunderstorms possible later in the day, which matters because the contract settles on the day’s *highest* temperature at Shanghai Pudong International Airport Station, not the daytime average.[1][7] With the market currently pricing **0% YES**, the implied view is that traders see little chance of an outcome above the relevant threshold range despite a broadly hot forecast.
On comparable July conditions, Shanghai typically sits around **32°C** highs with very humid air and frequent rain, which supports a base case of a warm reading but not necessarily an extreme spike.[5][8] The key comparison for this contract is between sportsbook-style weather lines, which generally point to the low-to-mid 30s Celsius, and the prediction market’s near-zero implied probability, which suggests either a very tight trigger range or an assumption that airport observations will undershoot the city forecast. BBC Weather is currently much cooler at **22°C**, underscoring how much model choice and location can diverge even within the same city.[2]
Traders should watch the short-range forecast updates, especially any shift in rainfall timing, cloud cover, or wind direction that could cap afternoon heating at the airport.[1][7] Shanghai’s July climate is normally hot, humid, and rain-prone, with showers and thunderstorms common enough to interrupt surface warming, so changes in convective activity are the main catalyst for a higher daily maximum.[5][6] The contract’s settlement window ends at **12:00 UTC**, making the morning-to-midday Shanghai temperature path particularly relevant for the final reading.
Methodology
We track Highest temperature in Shanghai on July 24? 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
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
- 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 Best Prediction Markets. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- 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.
- Do I need to KYC for this market?
- On Polymarket directly, no — it's wallet-based. Intermediary brokers like Best Prediction Markets 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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