Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Legal 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 |
|---|---|
| 35°C | 100% |
| 28°C or below | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
| 34°C | 0% |
| 36°C | 0% |
| 37°C | 0% |
| 38°C or higher | 0% |
Market context
Beijing’s 4 August maximum at Capital International Airport is a single-day temperature print, so the market is really about whether the airport reading lands in the *mid-30s Celsius* rather than merely feeling hot in the city. Published August outlooks for Beijing cluster around daytime highs of roughly 30–36°C, with some forecasts pointing to 32–34°C and others up to 36°C, while late-summer humidity and scattered rain can cap the top end if cloud cover persists.[1][3][4][10][11][14]
The current 0% YES price implies the market is still discounting the event almost entirely, which is unusually low relative to comparable Beijing August forecasts and the city’s normal peak-summer pattern. Historic and seasonal guides place Beijing’s August highs around 30–32°C on average, with hotter spells above 35°C often occurring in the first half of the month, so a low price only becomes easier to justify if traders expect a cooler, rain-affected reading at the airport specifically.[4][6][12][15] For accessibility, the legal frame matters: German GlüStV restrictions can limit participation from German users depending on venue classification and local compliance, US CFTC reach is relevant where a contract is treated as derivatives-like, and “no-KYC up to $1,500” usually means small-volume access without identity verification, but not a blanket exemption from geo-blocking or other jurisdictional controls.
For traders, the practical catalysts are the day’s Beijing weather evolution, airport station observations, and any forecast revisions as the afternoon heating window closes. The market resolves from Wunderground’s Beijing Capital International Airport Station history page, so the key dependency is the highest recorded temperature there before the settlement cut-off, not the broader city forecast.[13] If the airport sees midday sun and limited convection, the printed high can exceed city averages; if showers or thick cloud arrive during peak heating, the outcome can stay anchored in the low- to mid-30s instead.
Methodology
This overview of Highest temperature in Beijing on August 4? 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 Polymarket Legal 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.
- 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.
- Can I trade anonymously?
- Pseudonymously, yes — up to the KYC threshold. Polymarket Legal UK stores an email address and wallet addresses rather than a legal name. Over $1,500 lifetime volume triggers KYC, after which identity is no longer anonymous.
- 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), Polymarket Legal UK would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.
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