Highest temperature in Shanghai on August 12?

Platform comparison

Market context

Shanghai's highest temperature on 12 August 2026 will be measured at Pudong International Airport Station and resolved via Weather Underground's Daily Observations table, the primary source in case of discrepancies with summary forecasts. The settlement window closes at 12:00 UTC on that date, requiring resolution data to be finalised by early afternoon Shanghai time.

August in Shanghai typically records daily highs between 32–35°C, with occasional peaks above 36°C during heat waves. Historical records from the past decade show that extreme heat events—temperatures exceeding 38°C—occur roughly once every two to three years in mid-August, driven by Pacific typhoon systems or sustained high-pressure ridges over eastern China. The 0% crowd probability suggests traders are either awaiting clearer seasonal forecasts or treating this as a calibration test for the resolution mechanics rather than pricing genuine uncertainty about whether a measurable high will occur.

Traders should monitor China Meteorological Administration forecasts released in early August 2026, which typically provide 10-day outlooks by early month. El Niño or La Niña conditions in the tropical Pacific, tracked by NOAA, influence summer heat patterns across eastern China and will shape whether August 2026 trends warmer or cooler than the 30-year normal. Typhoon activity in the Western Pacific during late July and early August will be the primary near-term catalyst; systems tracking toward or away from the Yangtze River Delta region materially shift temperature outcomes. USDC settlement will execute once Weather Underground data is confirmed and no longer subject to revision.

Methodology

This page reads Highest temperature in Shanghai on August 12? 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

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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.

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