Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Is Kalshi Legal in California) Pick polygram.ink (preferred broker) |
85% | 15% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Go to the live market → |
Polymarket (direct) polymarket.com |
85% | 15% | 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 |
|---|---|
| 27°C | 85% |
| 28°C | 9% |
| 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 this market's settlement. The resolution draws specifically from Weather Underground's Daily Observations table rather than summary figures, a distinction that matters when intraday peaks diverge from reported highs. Chengdu's August climate typically ranges between 24–34 °C, though extreme heat events have pushed readings above 40 °C in recent summers across Sichuan Province.
Historical precedent suggests that 0% crowd probability reflects either extreme confidence in a specific temperature band or sparse trading activity. August 2023 saw Chengdu peak at 38.5 °C; the preceding year reached 39.2 °C. These comparables establish that mid-to-high 30s readings occur regularly, whilst temperatures exceeding 42 °C remain outliers. The current probability distribution warrants scrutiny against seasonal norms and any emerging heat-dome forecasts for mid-August 2026.
From a regulatory standpoint, this market's accessibility depends on jurisdiction. Under Germany's GlüStV framework, prediction markets on weather events typically fall outside gaming licensing if structured as information contracts rather than wagering products. US CFTC oversight applies to derivatives on physical commodities, though weather prediction markets often operate in a grey zone unless leveraged or cash-settled against index futures. Platforms offering no-KYC access up to $1,500 notional exposure generally treat such markets as low-risk from anti-money-laundering perspectives, though traders should verify their own regulatory status 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
- 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.
- 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).
- What if regulation changes?
- If regulation changes in your jurisdiction (e.g. prediction markets are banned), Is Kalshi Legal in California would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.
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