Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Tax UK) Pick polygram.ink (preferred broker) |
62% | 38% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
62% | 38% | 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 | 62% |
| 35°C | 20% |
| 33°C | 18% |
| 36°C | 2% |
| 28°C or below | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 37°C | 0% |
| 38°C or higher | 0% |
Market context
Shanghai’s reading on 7 August will come from the highest temperature recorded at Shanghai Pudong International Airport Station by Wunderground, so the market is about the day’s official local peak rather than a city-wide average. Early-August Shanghai is normally hot and humid, with forecast ranges for 7 August around the low-to-mid 30s °C and daily highs commonly near 32–35°C in third-party forecasts, which places the current 0% implied YES close to an unlikely extreme outcome rather than an ordinary summer result.[1][2][3][10]
The main historical frame is that Shanghai’s August temperatures tend to cluster in the high 20s to low 30s °C, with occasional hotter spikes: climate references put typical August highs around 32–32°C / 90°F, while broader temperature distributions show rare days reaching the mid-30s °C and above. That makes the key question for this market whether the airport station sees a transient heat peak above the usual range, rather than whether the city is generally warm.[10][13][15][16]
For traders, the immediate catalysts are the day’s actual weather evolution, any convective showers or cloud cover, and whether late-morning or early-afternoon heating is suppressed by rain or sea-breeze effects; the relevant forecast sources currently show passing showers or overcast periods alongside high humidity, which can cap the maximum. From an accessibility standpoint, the market is typically usable without full identity verification up to roughly $1,500 equivalent, but platform limits can still affect deposits, withdrawals, and regional access; German GlüStV rules may also matter because they can restrict participation or onboarding for some users, while US CFTC reach is relevant where a venue is treated as offering a derivatives-style product, even if the practical impact depends on the platform’s jurisdictional settings and user location.
Methodology
This overview of Highest temperature in Shanghai on August 7? 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.
UK Frequently Asked Questions
- 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.
- Is Polymarket regulated by the UKGC?
- No. Polymarket is not licensed by the UK Gambling Commission (UKGC). It is a decentralised prediction market operated under US regulation. UK traders can use it but do not benefit from UKGC dispute resolution or player protection requirements.
- What are the HMRC tax rules on Polymarket profits for UK traders?
- Polymarket profits are treated as cryptocurrency disposal events by HMRC. Each USDC settlement is a taxable event subject to Capital Gains Tax (CGT). For 2026/27, the CGT rate is 18% (basic rate) or 24% (higher rate). The annual CGT exemption is £3,000. Report via HMRC Self Assessment if your total crypto gains exceed £3,000 or proceeds exceed £50,000.
- Does Polymarket KYC apply to UK users?
- Yes. Polymarket requires KYC (Know Your Customer) verification for all users, including UK residents. You must provide a government-issued photo ID and a selfie. The process typically takes 5–10 minutes via their ID verification provider.
- What is the legal difference between Polymarket and Betfair Exchange for UK traders?
- Betfair Exchange is UKGC-licensed, meaning UK consumer protections apply and winnings are typically tax-free. Polymarket is not UKGC-licensed — it operates under decentralised blockchain rules. Profits from Polymarket are subject to HMRC CGT as crypto disposals. Choose based on your regulatory preference and tax situation.
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