Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Is Polymarket Legal in Canada) Pick polygram.ink (preferred broker) |
99% | 1% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open the market → |
Polymarket (direct) polymarket.com |
99% | 1% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open the market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open the market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open the market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open the market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 34°C | 99% |
| 35°C | 1% |
| 26°C or below | 0% |
| 27°C | 0% |
| 28°C | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
| 36°C or higher | 0% |
Market context
Chengdu’s airport temperature on 3 August will hinge on whether the day behaves like a typical early-August heat event or a cooler, rain-disrupted summer day. Seasonal guides put Chengdu in August around the low-30s Celsius at the daily high, with humidity and scattered showers common, so a settlement outcome in the mid-to-high 20s or low 30s is far more consistent with the local climate than a very low reading.[1][3][10][15][17]
The current **0% YES** crowd-implied probability is best read as a market signal about process rather than climate: if there has been no fresh data feeding the book, an airport-based maximum temperature still tends to settle within a familiar summer band, not an extreme outlier. Comparable August forecasts for Chengdu cluster around highs of roughly 30–35°C, with some sources showing 33–35°C for 3 August and long-run averages near 30°C, which suggests the market may be underweighting a normal hot-day outcome if it stays at zero.[3][4][10][13]
For accessibility, the regulatory frame matters as much as the weather. A German participant may face **GlüStV** restrictions because many online betting-style or event-contract products can be treated as gambling-adjacent under German law, while **US CFTC reach** matters because US residents can be constrained by derivatives and event-contract rules even when the market itself is offshore; that is a legal-risk overlay, not a forecast of settlement. “**No-KYC up to $1,500**” usually means a user can interact with the market up to that threshold without full identity verification, but it does not remove sanctions screening, jurisdiction blocks, or platform compliance controls, so accessibility can still be limited by country and payment rails.
Methodology
This overview of Highest temperature in Chengdu on August 3? 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 Polymarket Legal in Canada 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.
- What happens during a tax audit?
- You're responsible for documenting your trades. Is Polymarket Legal in Canada 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.
- 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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