Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Tax UK) Pick polygram.ink (preferred broker) |
87% | 13% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
87% | 13% | 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 | 87% |
| 36°C | 13% |
| 37°C | 1% |
| 30°C or below | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
| 34°C | 0% |
| 38°C | 0% |
| 39°C | 0% |
| 40°C or higher | 0% |
Market context
On 28 July 2026, the highest temperature recorded at Beijing Capital International Airport will fall into one of several defined ranges. Historical July data from the station shows peak temperatures typically between 32–36 °C, though extremes have occasionally exceeded 37 °C during heat waves. The current 0% crowd probability suggests traders expect the outcome to fall outside whichever range this market's upper bound defines; this disconnect often signals either high confidence in a specific threshold or insufficient liquidity to establish a baseline.
Beijing's summer weather patterns depend heavily on the East Asian monsoon system and occasional tropical cyclone activity. Late July typically marks the peak of the rainy season, which can suppress afternoon highs, though persistent high-pressure systems occasionally override this pattern. The China Meteorological Administration publishes daily forecasts and historical station data; traders should monitor their 10-day outlook issued around 18 July and any tropical storm warnings from the Western Pacific that might alter atmospheric circulation by month-end.
From a regulatory standpoint, this weather derivative falls under different frameworks depending on trader location. The German GlüStV treats prediction markets as gambling products requiring state licensing; UK-domiciled platforms must comply with Gambling Commission standards. US CFTC jurisdiction over event contracts remains unsettled for non-financial outcomes, though most US traders access offshore venues. Platforms offering no-KYC access up to $1,500 notional exposure typically rely on this regulatory grey zone, meaning traders should verify their own jurisdiction's stance before participation. Settlement depends entirely on Wunderground's historical data feed for ZBAA station, which is publicly auditable.
Methodology
This overview of Highest temperature in Beijing on July 28? 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.
- 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 Tax 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).
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