Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Prediction Today) Pick polygram.ink (preferred broker) |
40% | 60% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
40% | 60% | 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 | 40% |
| 37°C | 35% |
| 39°C | 15% |
| 40°C | 1% |
| 41°C | 1% |
| 34°C or below | 0% |
| 35°C | 0% |
| 36°C | 0% |
| 42°C | 0% |
| 43°C | 0% |
| 44°C or higher | 0% |
Market context
Chengdu is already starting from a very hot base, and the latest hourly forecast points to a daytime peak around 104°F, with the warmest readings clustering in the early to mid-afternoon before thunderstorm chances rise later in the day.[6] That matters because this market settles on the highest temperature actually recorded at Chengdu Shuangliu International Airport Station, so any brief overshoot before cloud and rain arrive can decide the bin.
For context, July in Chengdu is typically hot and humid, with daytime highs commonly in the 29–37°C range and occasional spikes as high as 39°C during peak heat hours.[1] The crowd has centred on 38°C as the frontrunner, with 39°C next, which fits a market expecting heat strong enough to challenge the upper end of the usual July range but not necessarily to break much beyond it.[2] Yesterday’s airport-area conditions were already near that territory, with a latest reported temperature of 90°F and muggy dew point readings, underscoring how little cooling has been taking place overnight.[3]
The main catalysts to watch are the timing of solar heating, cloud build-up, and whether afternoon convection suppresses the maximum before the day’s top reading is logged. AccuWeather’s hourly outlook shows temperatures rising from the high 80s°F in the morning to 104°F around mid-afternoon, then easing as thunderstorm probabilities increase later on.[6] If the hottest hour lands before storm development, the higher Celsius bins become more plausible; if showers arrive early, the final high is more likely to stop short of the very top outcomes.[6]
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
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
- 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.
- How does resolution work?
- Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.
- 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 Prediction Today trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.
Trade Highest temperature in Chengdu on July 23? on Prediction Today
Live order book, 0% fees, USDC settlement in seconds.
Open live market →