Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket KYC UK) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
100% | 0% | 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 |
|---|---|
| 34°C | 100% |
| 27°C or below | 0% |
| 28°C | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
| 35°C | 0% |
| 36°C | 0% |
| 37°C or higher | 0% |
Market context
The underlying event is the peak daytime heat recorded at Beijing Capital International Airport on 28 June 2026, a date that historically falls within the city’s warmest month. June in Beijing is predominantly sunny, with daytime temperatures typically ranging from 25°C to 30°C, though extremes above 35°C are possible during heatwaves [1][2]. The crowd-implied 0% probability for a specific high range suggests the market currently expects no unusual spike, yet historical data shows that daily highs often exceed 30°C unless cold air intervenes [4].
Comparable cases include May 30, 2026, when Beijing recorded its first heatwave day of the year at 35.2°C, and June 2023, when temperatures breached 41°C, shattering the monthly record [8][10]. These events frame the current probability as a baseline expectation rather than a guarantee; traders should monitor whether the 2026 heatwave pattern repeats or if meteorological models predict stable, moderate conditions. The catalyst to watch is the National Meteorological Centre’s weekly forecast, which updates every Monday and details impending heatwave risks or cold air intrusions [8].
Regulatory accessibility hinges on jurisdiction: German GlüStV implications may restrict unlicensed betting for residents, while US CFTC reach could limit participation for those in the US unless the platform is registered. The “no-KYC up to $1,500” threshold means traders can access this market without identity verification for stakes under that limit, enhancing liquidity but potentially inviting compliance scrutiny. This structure allows broad participation while navigating cross-border legal frameworks, though users must remain aware of local tax obligations and reporting requirements.
Methodology
This overview of Highest temperature in Beijing on June 28? 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. Polymarket KYC UK 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. Polymarket KYC UK 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. Polymarket KYC UK 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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