Highest temperature in Wuhan on August 10?

Platform comparison

Market context

Wuhan’s temperature market is effectively a bet on how hot the airport station gets on 10 August, with the current crowd-implied probability sitting at **0% YES** for the market’s priced range and the live book clustering around the low-30s Celsius. The favourite appears to be the **30°C** band, which is also where the consensus is concentrated, while the main value question is whether the day peaks a degree or two higher if sunshine breaks through the humidity and convective cloud does not suppress the afternoon high.[7][10][14]

Historical context favours a warm August reading but not necessarily a runaway extreme. Wuhan’s August average highs are typically around **33–35°C**, with record summer heat clearly capable of reaching the high 30s and, in exceptional cases, around **41°C**; however, the forecast market is not asking about the month’s average, only the single highest reading at Wuhan Tianhe International Airport on this date.[3][5][6][8][15] That makes the underdog outcomes above **31°C** live contrarian angles rather than default favourites, while a sub-29°C print would need notably cooler, cloudier or wetter conditions than the city’s normal August pattern.[10][17]

For traders, the key catalyst is the actual intraday weather at the airport rather than the broader city forecast, because the market resolves from Weather Underground’s **Daily Observations** table, not the headline day-high summary.[4][16] The current near-term forecast for Wuhan shows patchy rain nearby, high humidity and a forecast high around **29°C**, which supports the bearish side on the top-end temperature bins but also leaves room for a late lift if rainfall stays fragmented and the sun re-emerges.[14][20] In handicapper terms, the consensus is already leaning towards a middling warm day, so the value is more likely in either the slightly hotter contrarian tail or the cooler rain-interrupted outcome than in chasing the centre of the book.[7][14]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

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%.