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 |
|---|---|
| 32°C | 100% |
| 24°C or below | 0% |
| 25°C | 0% |
| 26°C | 0% |
| 27°C | 0% |
| 28°C | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 33°C | 0% |
| 34°C or higher | 0% |
Market context
Beijing’s airport station is the relevant real-world reference point here: the market settles on the *highest* temperature recorded there on 24 July, so the main question is whether the day tops out in an ordinary summer range or produces an unusually hot spike. July is typically Beijing’s hottest month, with average daytime highs around 31°C and humid conditions that can make even 30–35°C feel oppressive; at the same time, the month is also the city’s rainiest, so cloud and rain can suppress the maximum if thunderstorms develop[2][1].
That combination helps explain why a 0% crowd price can still be misleading if it reflects thin participation rather than a physical impossibility. Historic and comparable July patterns show Beijing often reaches the low 30s, but short-lived extremes are possible, with one cited July peak reaching 40°C in a recent year[2]. For a temperature market resolved by airport observations, the key is the station’s recorded maximum rather than the broader city forecast, so late-afternoon heating, convective showers, or a rain-cooled day can all matter more than headline averages[2][1].
From an accessibility angle, the market sits in the awkward overlap between prediction-market rules and jurisdictional constraints. Under Germany’s GlüStV framework, weather-linked outcome betting is generally treated as gambling content and can trigger licensing and consumer-protection issues for operators and users with German exposure; in the US, the CFTC’s reach matters if the venue is considered to offer event contracts or derivatives-like exposure tied to an external outcome. “No-KYC up to $1,500” usually means lighter identity checks before that threshold, which can make low-stakes participation easier, but it does not remove geoblocking, sanctions screening, or eligibility limits imposed by the platform.
Methodology
This overview of Highest temperature in Beijing on July 24? 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.
- Do I need to KYC for Is Kalshi Legal in California?
- Not for lifetime trading volume under $1,500. Above that threshold, a quick KYC flow kicks in — ID, selfie, approximately 5-10 minutes. The threshold matches FATF travel standards for unregulated crypto platforms.
- 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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