Highest temperature in Chengdu on August 9?

Platform comparison

Market context

Chengdu’s temperature on 9 August is being judged on the *highest observed reading* at Chengdu Shuangliu International Airport Station, not the broader day-high summary, so the market is really about whether the station’s daytime peak lands inside a given Celsius band. Current forecasts point to a hot, humid afternoon with highs in the low-to-mid 30s Celsius, and AccuWeather’s August outlook also allows for stronger spikes later in the month, with daily highs ranging from 82°F to 103°F across August.[1][10][11]

That framing makes a 0% implied “Yes” look more like a mechanical misread than a weather view: Chengdu’s August climatology is consistently warm, with average highs around 30°C to 31°C and occasional extreme highs into the high 30s or even above 40°C in historical records.[2][11][15][20] For a single-day forecast market, the main question is not whether it is hot, but whether the airport station’s peak lands in the settlement band once the official observations are posted.

The key catalysts are the late-morning to afternoon updates in the local forecast and the station observations that accumulate through the day. Wunderground’s Chengdu page was still showing live conditions shortly before settlement time, and several forecast providers were converging on a high around 32°C to 34°C with a meaningful thunderstorm chance, which can cap the top end if convection arrives early.[4][6][10][14] Traders should watch whether the airport station’s Daily Observations table prints a late-afternoon maximum above the forecast range; because the market settles on that table, a brief spike matters more than the headline summary elsewhere.[19]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Sports-specific comparison page for Highest temperature in Chengdu on August 9?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.

Resolution & payout

Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.

UK Frequently Asked Questions

When do sports markets resolve?

Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.

Can I bet on individual matches?

Yes, Polymarket lists every major Premier League / Champions League / World Cup match as its own market. Liquidity varies — top matches like El Clásico or a semi-final often have six-figure pools, lower-league games closer to three-figure.

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%.