Highest temperature in Chengdu on August 14?

Platform comparison

Market context

On 14 August 2026, the highest temperature recorded at Chengdu Shuangliu International Airport Station will determine this market's resolution. The settlement will reference the Daily Observations table on Weather Underground rather than the Day High & Low summary, a distinction that matters when intraday readings diverge from headline figures. Resolution occurs at 12:00 UTC on that date, with USDC settlement following confirmation from Wundergro's data feed.

Chengdu's August climate is consistently hot and humid, with historical highs typically ranging between 32–36°C. The 0% crowd probability suggests traders are either awaiting clearer forecast data or treating this as a placeholder ahead of the 2026 summer season. Comparable August readings from prior years show the city rarely exceeds 37°C on individual days, though heat waves can push sustained highs into that territory. The current flat probability reflects genuine uncertainty about which temperature band will materialise rather than consensus dismissal of higher outcomes.

Traders should monitor China's meteorological forecasts from late July onwards, as monsoon patterns and any anomalous heat events will shape expectations. El Niño or La Niña conditions heading into northern hemisphere summer could shift baseline temperatures. Funding rates on crypto markets often correlate with macro risk sentiment, and sustained heat waves in major Asian economies occasionally trigger energy-demand narratives that ripple through BTC and ETH spot markets—though direct causation remains weak. Watch for any official alerts from China's National Meteorological Centre in the fortnight before settlement.

Methodology

Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

UK Frequently Asked Questions

Why USDC and not ETH or USDT?

USDC is the Polygon standard — audited reserves (Circle, monthly attestation), deepest order book, low gas costs. ETH volatility would distort probability quotes; USDT has thinner Polygon liquidity than USDC.

How does UMA secure the resolution?

The UMA Optimistic Oracle uses a bond system: a proposer posts a bond, a two-hour challenge window opens. On dispute the losing side forfeits the bond — financial incentive for honest resolution.

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%.