Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Is Kalshi Legit) Pick polygram.ink (preferred broker) |
82% | 18% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | See live odds → |
Polymarket (direct) polymarket.com |
82% | 18% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | See live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | See live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | See live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | See live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 27°C | 82% |
| 28°C | 10% |
| 29°C | 7% |
| 30°C | 1% |
| 23°C or below | 0% |
| 24°C | 0% |
| 25°C | 0% |
| 26°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C or higher | 0% |
Market context
On 17 August 2026, the highest temperature recorded at Chengdu Shuangliu International Airport Station will determine the settlement outcome for this market. Resolution relies on the Daily Observations table from Weather Underground rather than summary figures, a distinction that occasionally produces material differences in recorded extremes. Chengdu's August climate typically peaks between 32–36 °C, though heat waves can push readings higher; the city sits in the Sichuan Basin, where topography and humidity patterns create localised thermal conditions distinct from surrounding regions.
Historical August temperature records for Chengdu show considerable year-to-year variance. The city experienced a peak of 40.2 °C in August 2006 during an exceptional heatwave, yet many Augusts settle in the 33–35 °C range. Current crowd probability of 0% suggests traders are pricing in either a specific temperature threshold that historical data makes unlikely, or uncertainty about which range brackets the eventual high. Comparable airport station data from inland Chinese cities indicates that extreme readings (above 38 °C) occur but remain infrequent; traders should cross-reference multi-year datasets from the China Meteorological Administration to calibrate expectations against the particular threshold this market specifies.
Traders should monitor China's summer weather patterns from June onwards, particularly the East Asian monsoon progression and any developing high-pressure systems over central China. The China Meteorological Administration publishes monthly forecasts and real-time station data; late July updates will sharpen visibility on August conditions. Under German GlüStV and US CFTC frameworks, weather derivatives remain largely unregulated if structured as prediction markets rather than financial instruments, though accessibility thresholds vary by jurisdiction—the "no-KYC up to $1,500" standard common in prediction markets may apply here depending on the platform's regulatory registration, but traders should verify their own compliance obligations before participation.
Methodology
This overview of Highest temperature in Chengdu on August 17? 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 Legit has a different geo footprint.
- Do I need to KYC for Is Kalshi Legit?
- 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.
- What happens during a tax audit?
- You're responsible for documenting your trades. Is Kalshi Legit exports a full transaction history (CSV/PDF) for tax reporting. In an audit you'll need to present these documents.
- What if regulation changes?
- If regulation changes in your jurisdiction (e.g. prediction markets are banned), Is Kalshi Legit would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.
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