Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Legal UK) Pick polygram.ink (preferred broker) |
99% | 1% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
99% | 1% | 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 |
|---|---|
| 28°C | 99% |
| 29°C | 1% |
| 24°C or below | 0% |
| 25°C | 0% |
| 26°C | 0% |
| 27°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
| 34°C or higher | 0% |
Market context
The real-world event is the highest temperature recorded at Beijing Capital International Airport Station on 23 July 2026, with the market resolving to whichever Celsius range contains that day’s peak reading from the Wunderground history page.[1] The current crowd-implied distribution is concentrated in the high 20s: 28°C leads at 34%, with 27°C close behind at 30%, which suggests traders are leaning towards a warm but not extreme summer day.[1]
That pricing fits Beijing’s late-July climatology, when daytime highs often sit in the upper 20s to low 30s Celsius, but the exact outcome still depends on cloud cover, rainfall, and whether the airport station briefly spikes above the main urban reading. The 0% yes figure should be read as a market-state snapshot rather than a literal forecast of impossibility; in range markets, probability can remain at zero for one bucket simply because liquidity is concentrated elsewhere. Comparable summer weather markets tend to reprice sharply on the day if forecasts shift towards rain, heat advisories, or a persistent continental heat ridge, so the key reference is the station’s observed maximum rather than city-wide commentary.
For accessibility, a no-KYC up to $1,500 threshold usually means smaller positions can be opened without full identity checks, while larger or higher-risk activity may trigger verification; that matters here because weather markets are often used for short-dated, relatively small bets. From a regulatory angle, German GlüStV issues are relevant because even low-stakes access can still fall within gambling-style restrictions for German residents, while the US CFTC reach matters if a product is treated as a derivatives-style event contract rather than ordinary betting. Traders should watch forecast updates, Beijing airport observations, and any platform-side changes to settlement timing or data sourcing, since the contract resolves on the station’s recorded high rather than an official city forecast.[1]
Sources: 1
Methodology
This overview of Highest temperature in Beijing on July 23? 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 Legal UK 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 Legal 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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