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 |
|---|---|
| 33°C | 100% |
| 26°C or below | 0% |
| 27°C | 0% |
| 28°C | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 34°C | 0% |
| 35°C | 0% |
| 36°C or higher | 0% |
Market context
The event is the **highest temperature recorded at Shenzhen Bao'an International Airport** during the day, with settlement based on Wunderground’s daily history page for that station. With the crowd at **0% YES**, the market is pricing in an outcome that is effectively treated as outside the expected range, even though the airport was already reporting **88°F** in late morning local conditions, with a **RealFeel** near **100°F** because of high humidity.[1]
For context, weather markets like this usually hinge on whether the day reaches a local peak that is materially above the morning reading, rather than on sustained heat alone. Shenzhen in July is typically influenced by monsoon moisture, so a very hot official maximum still needs clear skies, limited rain interference and enough time for afternoon warming; that is the kind of setup traders compare against when they see an extreme price like 0%.[1] From a regulatory angle, access can also depend on jurisdiction: German users may face GlüStV-related restrictions on participation in wagering-like products, while US persons can trigger broader scrutiny because CFTC jurisdiction can extend to certain event-based contracts even when the market is offered offshore.
Operationally, the main catalysts are straightforward: the airport’s hourly temperature path, any thunderstorms or rain bands, and the final Wunderground daily maximum, which is the settlement source. A “no-KYC up to $1,500” policy generally means small withdrawals or cumulative activity may be available without identity checks, but that does not change local legal access rules or the market’s reliance on the official Shenzhen Bao'an International Airport Station record.
Sources: 1
Methodology
This overview of Highest temperature in Shenzhen on July 22? 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.
- 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.
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