Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Tax UK) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
100% | 0% | 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 |
|---|---|
| 34°C | 100% |
| 28°C or below | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
| 35°C | 0% |
| 36°C | 0% |
| 37°C | 0% |
| 38°C or higher | 0% |
Market context
The real-world event is the **highest temperature recorded at Beijing Capital International Airport Station** on 13 July, as measured by Wunderground for the settlement window. July is Beijing’s hottest month on average, with typical highs around the low 30s Celsius, so a mid-30s outcome is materially plausible even before accounting for daily weather variability.[1][5]
The current 0% implied probability for “YES” should be read against both climatology and the market’s own ladder of temperature bands. Polymarket’s displayed pricing already puts the main weight on **34°C** and **35°C**, which is consistent with July heat in Beijing and with past extremes that have reached above 40°C in the city during severe heatwaves.[1][3][8] In practical terms, this is not a binary “hot or not” question: the settlement depends on the single highest reading at one airport station, so brief spikes, cloud cover, or thunderstorm timing can move the result across adjacent bands.
From a regulatory and access angle, the market sits in the usual grey zone for prediction platforms. Under Germany’s **GlüStV**, the key issue is whether a venue is treated as offering gambling to German residents, while in the US the **CFTC** can reach event contracts that resemble derivatives or swaps, so access can vary sharply by jurisdiction and product design. “No-KYC up to $1,500” generally means a user may be able to use the market with limited identity checks until cumulative activity hits that threshold, which improves accessibility but does not remove location-based blocks or legal restrictions; for a weather contract like this, that mainly affects who can place a small stake, not how the temperature is settled.
Methodology
This overview of Highest temperature in Beijing on July 13? 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.
- Do I need to KYC for Polymarket Tax UK?
- 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.
- What happens during a tax audit?
- You're responsible for documenting your trades. Polymarket Tax UK 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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