Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Bot UK) Pick polygram.ink (preferred broker) |
99% | 1% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Place a position → |
Polymarket (direct) polymarket.com |
99% | 1% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Place a position → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Place a position → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Place a position → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Place a position → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 35°C | 99% |
| 36°C | 1% |
| 28°C or below | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
| 34°C | 0% |
| 37°C | 0% |
| 38°C or higher | 0% |
Market context
The event is the **highest recorded air temperature at Shenzhen Bao’an International Airport Station** on 7 August, as logged in Weather Underground’s Daily Observations table, not the summary high/low box. For a programme-driven approach, the key task is to poll the station feed near the settlement cut-off and map the observed maximum into the market’s Celsius bands, because the outcome depends on the precise daily maximum rather than a forecast or a rounded headline figure.
The crowd’s 0% YES looks conservative against Shenzhen’s seasonal baseline. August is typically one of the hottest months in the city, with average highs around **32°C** and many references showing daily highs in the low- to mid-30s, while some guidance allows for **35°C** or more on hotter days.[5][7][9][10] Even so, a market settling to a specific temperature range can stay clustered near zero when traders expect the final observation to land just outside the more tightly priced band, or when they prefer to wait for the live station readout rather than front-run modelled weather.
The main catalysts are the same ones a bot or conditional order stack would watch: convective showers, cloud cover, and any short-lived heat spike before the settlement window closes. Shenzhen is in the May-to-September rainy season, and recent guidance for the day points to patchy rain and a forecast around **32°C/27°C**, which can cap the realised high if cloud and rain arrive early.[8][19] For automation, the practical dependency is not the forecast itself but the timing of the last official observation before 12:00 UTC and any late-morning update that could shift the day’s maximum by a degree or two.[1][14][17]
Methodology
This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket Bot UK, which mirrors the Polymarket order book directly.
Resolution & payout
Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.
Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.
UK Frequently Asked Questions
- Is this market available outside the US?
- Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.
- How does resolution work?
- Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.
- Is Polymarket legal in the UK?
- Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.
- Do I pay tax on prediction market profits in the UK?
- UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.
- How do I deposit on Polymarket from the UK?
- UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.
Trade Highest temperature in Shenzhen on August 7? on Polymarket Bot UK
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