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 the settlement band. The market currently shows zero crowd conviction, suggesting either extreme uncertainty about the specific temperature range or insufficient trader participation at launch. Resolution will draw from Weather Underground's Daily Observations table rather than the Day High & Low summary, a distinction that matters when intraday spikes occur before official daily highs are logged.

Wuhan's August climatology provides the baseline: the city averages 32–34°C during mid-August, with extremes occasionally reaching 37–39°C during heat waves. Historical data from the past decade shows roughly 15–20% of August days exceed 35°C, whilst temperatures above 38°C occur in fewer than 5% of cases. The 0% implied probability suggests the market may be pricing in either an unusually cool August 2026 or reflecting thin liquidity rather than genuine forecast confidence. Comparable East Asian summer markets have typically seen probabilities cluster around 30–50% for high-temperature bands, indicating this market's current state is an outlier worth monitoring.

Traders should track China's summer monsoon patterns and any El Niño or La Niña signals from June onwards, as these drive regional temperature anomalies. The China Meteorological Administration publishes monthly forecasts in early August; any alerts for heat waves in the Yangtze River basin would shift expectations sharply. Settlement occurs at 12:00 UTC on 20 August 2026, giving traders a fixed window to arbitrage any late-breaking weather data against on-chain pricing before USDC payouts are triggered.

Methodology

This page reads Highest temperature in Wuhan on August 20? on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.

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

What does a transaction cost on Polygon?

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No, Polymarket operates exclusively in USDC on Polygon. You can bridge BTC to USDC via an exchange or bridge service and deposit on Polygon — typically 10-30 minutes processing time.

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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?

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