Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
82% | 18% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
82% | 18% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open live market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 24°C | 82% |
| 25°C | 13% |
| 26°C | 4% |
| 28°C | 2% |
| 27°C | 1% |
| 29°C | 1% |
| 23°C or below | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C or higher | 0% |
Market context
Chongqing’s airport temperature on 3 August will be set by the single highest reading recorded at Chongqing Jiangbei International Airport, with the market settling in USDC according to the Wunderground history page for that station. In plain weather terms, the event is about whether the day’s peak heat reaches the top of the usual early-August range or stays nearer the long-run norm. Chongqing is typically hot and humid in August, with published climate guides putting average highs around 33–34°C and describing the month as “unbearably hot”; one guide lists 3 August’s historical high at 34.7°C. [2][9][20]
That framing matters because a 0% YES price implies the crowd is effectively assigning no chance to the contract’s target temperature band, which is a strong stance for a city where August highs often sit in the low-to-mid 30s Celsius. Historical climate references also show that Chongqing can overshoot its seasonal averages materially, with the city’s all-time peak reaching 43°C in August 2022. [4][9][20] For a prediction market, the key question is not the monthly mean but whether today’s airport observation clears the relevant bracket before the settlement cut-off.
Traders should watch the local intraday temperature path, cloud cover, rainfall and any official weather updates, because the resolution depends on the airport station’s recorded maximum rather than citywide averages. August in Chongqing is also a rainy period, and precipitation or persistent cloud can cap daytime heating even in a hot climatology. [2][9][20] On the market side, the on-chain payout is straightforward: the winning range receives the USDC settlement, so any late move in the observed high — not broader BTC or ETH market conditions — is what will matter unless liquidity, whale flow or funding in related crypto markets changes positioning into the close.
Methodology
This page reads Highest temperature in Chongqing on August 3? on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.
Resolution & payout
Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.
Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.
FAQ
- What are crypto prediction markets?
- Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.
- Why USDC and not ETH or USDT?
- USDC is the Polygon standard — audited reserves (Circle, monthly attestation), deepest order book, low gas costs. ETH volatility would distort probability quotes; USDT has thinner Polygon liquidity than USDC.
- How does UMA secure the resolution?
- The UMA Optimistic Oracle uses a bond system: a proposer posts a bond, a two-hour challenge window opens. On dispute the losing side forfeits the bond — financial incentive for honest resolution.
- How volatile are crypto prediction markets?
- Crypto markets react to spot prices — a 5% BTC move typically shifts a "BTC above X by date" market 10-20%. Polymarket crypto market liquidity is usually six-figure USD, sufficient for active trading.
- Which crypto markets exist on Polymarket?
- Currently active markets include BTC/ETH/SOL price targets, halving dates, ETF approvals, hard-fork outcomes and Layer-2 TVL thresholds. The list updates weekly; biggest volume sits on BTC and ETH price forecasts.
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