Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Germany Legal) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | View on Polymarket → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | View on Polymarket → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | View on Polymarket → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | View on Polymarket → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | View on Polymarket → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 37°C | 100% |
| 29°C or below | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
| 34°C | 0% |
| 35°C | 0% |
| 36°C | 0% |
| 38°C | 0% |
| 39°C or higher | 0% |
Market context
Guangzhou’s hottest reading on 6 August will be taken from the Baiyun International Airport station, and the market settles on the day’s peak temperature in Celsius from Wunderground rather than a citywide average. August in Guangzhou is normally hot and very humid, with typical highs around 32–33°C and frequent rain, so the main question is not whether it will be warm but whether the airport station tops out in the mid-30s or pushes higher.[2][6][9][10][16]
The current 0% yes price is best read as a liquidity or positioning signal, not as a meteorological forecast. Recent market commentary has pointed to a 36–37°C range in Guangzhou on this date, which is consistent with August climatology and with the city’s record of occasional upper-30s heat, including record highs around 38.4°C in historical datasets.[11][13] That makes a very low implied chance on the event noteworthy, because it sits well below both the seasonal norm and the active forecast range cited on the market page.[13]
For accessibility, the regulatory frame matters as much as the weather. In Germany, prediction markets can trigger GlüStV gambling-treatment issues if they are seen as wagering on uncertain events, so availability to German users may depend on how the platform and local enforcement classify the contract. In the US, CFTC reach is relevant because event contracts may be treated as derivatives if offered to US persons. “No-KYC up to $1,500” generally means a user can trade without full identity verification until cumulative activity reaches that threshold, which makes the market easier to access at small size but does not remove jurisdictional restrictions or venue-specific limits.
Methodology
This overview of Highest temperature in Guangzhou on August 6? 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 Germany Legal 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. Polymarket Germany Legal 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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