Highest temperature in Wuhan on August 20?

Platform comparison

Market context

Wuhan will experience peak summer heat on 20 August 2026, with the highest temperature recorded at Tianhe International Airport Station determining which range this market settles into. The 0% YES probability currently priced on Polygon reflects the market's assessment that the actual high will fall outside whatever threshold defines the affirmative outcome—though the market description does not specify which temperature range constitutes a YES resolution, creating ambiguity about what traders are actually pricing against.

August represents Wuhan's hottest month climatologically, with daily highs typically ranging between 32–35°C, though readings occasionally exceed 37°C during heat waves. Historical data from the past decade shows that extreme heat events (above 38°C) occur roughly once every two to three years in mid-August, whilst temperatures below 30°C are exceptionally rare. The current crowd probability suggests traders expect a relatively moderate day by Wuhan standards, or that the YES threshold has been set sufficiently high to make such outcomes unlikely given seasonal norms.

Weather Underground's Daily Observations table, designated as the primary resolution source, records sub-daily temperature readings and may differ from the Day High & Low summary section—a distinction that matters for edge cases where afternoon thunderstorms cool the air after the peak. Traders should monitor China Meteorological Administration forecasts from mid-August 2026 and watch for any announced heat warnings from Hubei Province authorities, which typically signal sustained high-pressure systems capable of driving temperatures into the 37–39°C range. The settlement window closes at 12:00 UTC on the event date, giving traders roughly half the day's temperature range before final resolution.

Methodology

We track Highest temperature in Wuhan on August 20? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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

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 Scam?. 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%.