Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Review 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 |
|---|---|
| 32°C | 100% |
| 26°C or below | 0% |
| 27°C | 0% |
| 28°C | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 33°C | 0% |
| 34°C | 0% |
| 35°C | 0% |
| 36°C or higher | 0% |
Market context
Beijing’s outcome here will be set by the **highest Celsius reading logged at Beijing Capital International Airport on 8 August**, using the Daily Observations table on Weather Underground rather than any headline “Day High & Low” figure. That makes it a good candidate for programmatic monitoring: a bot can poll the station page, extract the table values, and map the day’s peak into the market’s temperature bands as the afternoon data lands. On 8 August, the historical pattern in Beijing is for daytime highs around 30–31°C in August, with some years materially hotter, so a 0% YES price looks like a market that is either awaiting fresh data or pricing a bucket that currently appears out of range.[3][6][14]
Comparable August readings at Beijing have often clustered in the high 20s to low 30s °C, with long-run averages around 31°C and occasional hotter extremes above that level.[6][12][14] Recent weather-history pages also show Beijing moving through warm, humid conditions in early August, with one live history feed reporting 82°F at Beijing Capital International Airport on 8 August in the morning UTC window, which is consistent with a warm but not necessarily exceptional day.[4][19] For a trader using conditional orders or copy-trading tools, the key historical lesson is that the market’s eventual bucket will usually depend on whether the day reaches an afternoon spike or remains capped by cloud, rain, or weaker sunshine.
The main catalysts to watch are the airport station’s midday and afternoon observation updates, because Beijing’s daily maximum often arrives later in the local day, not in the morning UTC snapshots.[1][4] Weather Underground’s history page for Beijing is the settlement source, so any discrepancy between a summary high and the detailed observations table should be resolved in favour of the latter.[16] If you are automating this, the practical dependency chain is simple: pull the station observations, normalise Celsius values, track the highest printed reading up to the settlement cut-off, and avoid using third-party summaries that may lag or round differently.[16]
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 Review UK, which mirrors the Polymarket order book directly.
Resolution & payout
At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.
On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.
UK Frequently Asked Questions
- Where can I trade this market with the lowest fees?
- Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Polymarket Review UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- 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.
- 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 Beijing on August 8? on Polymarket Review UK
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