Highest temperature in Shanghai on August 14?

Platform comparison

Market context

On 14 August 2026, Shanghai will record a daily high temperature at Pudong International Airport Station. This market asks traders to predict which temperature range will contain that highest reading, measured in degrees Celsius. In prediction markets, a YES share pays out if the event occurs as specified; a NO share pays out if it does not. Here, traders are essentially betting on which bracket—say, 32–34°C or 35–37°C—will match the actual peak recorded in Weather Underground's Daily Observations table that day.

Shanghai's August climate is consistently hot and humid, with historical daily highs typically ranging between 32 and 35°C. The current 0% crowd probability suggests traders have not yet engaged meaningfully with this market, which is unsurprising given the two-year settlement window. August 2026 temperatures will depend on broader patterns: La Niña or El Niño conditions, monsoon intensity, and any anomalous heat events affecting East Asia. Comparable August days at Pudong show little variance year-on-year, clustering around the 33–35°C band, though extreme heat waves have occasionally pushed readings above 37°C.

Traders should monitor seasonal forecasts released by the China Meteorological Administration in the months preceding August 2026, as these often signal departures from historical norms. Tropical cyclone activity in the Western Pacific during summer can suppress temperatures or, conversely, create stagnant heat domes. The resolution hinges on Weather Underground's Daily Observations table specifically—not the Day High & Low summary—making source verification critical at settlement.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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 Prediction Market UK. 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%.