Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Is Kalshi Legal in California) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Go to the live market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Go to the live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Go to the live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Go to the live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Go to the live market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 34°C | 100% |
| 28°C or below | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
| 35°C | 0% |
| 36°C | 0% |
| 37°C | 0% |
| 38°C or higher | 0% |
Market context
Chongqing is heading into one of its hottest periods, and the market will settle on the highest **observed** temperature at Chongqing Jiangbei International Airport, not the headline high from a forecast summary. August normals for the city sit in the mid-30s Celsius, with several climate sources describing August as the hottest month and peak readings often pushing into the upper 30s or low 40s in heatwave conditions.[2][4][6][8][17]
The current **0% YES** crowd price is well below the seasonal baseline, so it reads more like a lack of participation than a strong view that sub-bracket outcomes are impossible. Comparable Chongqing temperature markets on prediction platforms have resolved on exact observed daily highs, which underlines that late-day cooling, showers, or station-specific observations can matter more than citywide expectations.[3][20] For accessibility, the market’s “no-KYC up to $1,500” framing usually means smaller positions can be taken without full identity verification, while larger activity may still trigger checks; if the venue is offered to Germans, the GlüStV regime is relevant because it can restrict or reshape access to games and wagering products, and US-facing activity can fall within CFTC reach if it implicates derivatives-style trading rather than simple commentary.
The main catalysts are the airport observations themselves, the timing of any thunderstorms, and whether the daily sequence of reports confirms a late-afternoon peak before the settlement window closes. AccuWeather’s forecast for Chongqing on 10 August points to a hot, humid day with a 95°F/79°F range and possible thunderstorms, which would support temperature variability rather than a locked-in outcome.[12][14] Because the market resolves from Weather Underground’s Daily Observations table, traders should watch for the final reported high there, especially if rain, cloud cover, or a later update changes the apparent maximum.[3]
Methodology
This overview of Highest temperature in Chongqing on August 10? reviews the four comparable platforms from a regulatory perspective: which is accessible in your jurisdiction, where KYC kicks in, how the platform is classified by your country of residence. Live probability is the Polymarket mid; comparison columns show regulatory status, KYC thresholds and settlement options for each platform.
Resolution & payout
On Polymarket, resolution runs on-chain via UMA Optimistic Oracle. USDC payout is instant and automatic, with no KYC. Tax treatment depends on your jurisdiction — in the US, gains are usually ordinary income; in the UK, often capital gains. Consult a tax professional for your situation.
FAQ
- Is Polymarket legal in my country?
- Polymarket is geo-blocked in the US/UK/EU. Actual usage via the Polymarket interface is not possible there. The legal status itself varies — many countries treat prediction markets as a gray area. Is Kalshi Legal in California has a different geo footprint.
- How are winnings taxed?
- Tax treatment varies by jurisdiction. In most countries, prediction market gains are treated as ordinary income or capital gains. We cannot provide tax advice — consult a tax professional for your specific situation.
- Can I trade anonymously?
- Pseudonymously, yes — up to the KYC threshold. Is Kalshi Legal in California stores an email address and wallet addresses rather than a legal name. Over $1,500 lifetime volume triggers KYC, after which identity is no longer anonymous.
- What happens during a tax audit?
- You're responsible for documenting your trades. Is Kalshi Legal in California exports a full transaction history (CSV/PDF) for tax reporting. In an audit you'll need to present these documents.
- Are prediction markets gambling?
- Legally unclear in most jurisdictions. Some interpretations classify them as wagering (gambling regulation applies), others as derivatives (financial regulation applies). There's no global precedent specifically for on-chain prediction markets.
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