Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Tax UK) Pick polygram.ink (preferred broker) |
94% | 6% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
94% | 6% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Trade this market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Trade this market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Trade this market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Trade this market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 37°C | 94% |
| 38°C | 6% |
| 39°C | 1% |
| 34°C or below | 0% |
| 35°C | 0% |
| 36°C | 0% |
| 40°C | 0% |
| 41°C | 0% |
| 42°C | 0% |
| 43°C | 0% |
| 44°C or higher | 0% |
Market context
Chengdu’s airport weather station will determine whether the day’s maximum temperature on 23 July lands inside the market’s winning range. With a settlement source tied to Wunderground’s daily history for Chengdu Shuangliu International Airport, the practical question is whether the afternoon peak reaches a bracket that traders currently assign almost no chance to, despite the city’s established midsummer heat profile.
A 0% crowd price usually reflects either stale participation or a belief that the relevant range is already excluded by the forecast path, rather than a literal impossibility. For temperature markets, the strongest comparables are prior days with early-morning starts, heavy cloud cover, or rainfall suppressing the daily high; conversely, inland Sichuan summer conditions can still produce sharp late-day spikes if sunshine returns. In a regulatory context, German users also have to read this through the lens of the GlüStV framework, which can affect access and local tax treatment, while US-facing reach is shaped by CFTC jurisdictional sensitivity around event contracts. The “no-KYC up to $1,500” threshold, where offered, typically means smaller-volume access with fewer identity checks, but it does not remove broader geoblocking, account-review, or compliance restrictions that can still apply to a Chengdu weather contract.
The main catalysts are straightforward: the observed hourly temperature curve in Chengdu, any late-morning cloud or rain developments, and the final afternoon maximum at the airport station. Traders should watch for local forecast updates from Chinese and international weather services, because the settlement source only cares about the highest reading recorded on the day, not the headline city forecast. In practice, a warm start before midday can still be overtaken by a later spike, so the intraday profile matters more than the opening temperature alone.
Methodology
This overview of Highest temperature in Chengdu on July 23? 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 Tax 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 Tax 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.
- 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.
- Is there a withdrawal cap?
- No platform-side cap. You can withdraw any amount provided KYC is complete. SEPA bank withdrawals over €15,000 trigger additional anti-money-laundering checks (statutory obligation for all platforms).
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