Highest temperature in Shanghai on August 14?

Platform comparison

Market context

Shanghai's highest temperature on 14 August 2026 will be recorded at Pudong International Airport Station and measured against defined Celsius ranges. The market currently prices this event at 0% YES, indicating traders are either uncertain about which temperature band will occur or awaiting settlement mechanics clarification. On Polygon, this conditional token contract settles in USDC once Weather Underground's Daily Observations table confirms the peak reading for that date.

August represents Shanghai's hottest month climatologically, with average daily highs around 32–33°C, though extremes regularly exceed 35°C during heat waves. Historical data from the past decade shows 14 August specifically has produced temperatures ranging from 29°C to 37°C depending on the year and prevailing weather patterns. The 0% probability suggests the market may lack liquidity or traders are waiting for clearer range definitions before committing capital. Comparable summer temperature markets on Polymarket typically see activity concentrated in the week before settlement as meteorological forecasts solidify.

Traders should monitor China Meteorological Administration forecasts and tropical cyclone activity in the Western Pacific, both of which influence Shanghai's late-summer heat. Any significant weather system approaching the region in early August could suppress temperatures materially. The resolution dependency on Weather Underground's specific Daily Observations table—rather than summary figures—means traders should verify historical station data consistency before positioning, as discrepancies between reporting methods have occasionally created settlement disputes on weather contracts.

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 PolyGram. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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%.