Highest temperature in Shanghai on August 16?

Platform comparison

Market context

Shanghai's weather on 16 August 2026 will be measured at Pudong International Airport Station, with the market resolving to whichever temperature bracket captures the highest reading logged in Weather Underground's Daily Observations table that day. The crowd currently prices this contract at 0% YES, suggesting traders see minimal probability of the outcome materialising—though the specific temperature threshold underpinning this assessment remains unclear from the current market display on Polygon.

Mid-August in Shanghai typically falls within the city's hottest period, with historical August averages around 32–33°C and peak temperatures frequently exceeding 35°C. The 2023 summer saw Shanghai record 40.9°C in July, whilst August 2022 peaked at 38.1°C at Pudong. These precedents establish that extreme heat is plausible rather than exceptional for this timeframe. The resolution mechanism's reliance on Weather Underground's Daily Observations table—rather than the Day High & Low summary—introduces a technical dependency that traders should verify against historical discrepancies between the two data sources.

Traders monitoring this contract should track China Meteorological Administration forecasts released in early August 2026, particularly any warnings for high-temperature events across the Yangtze River Delta region. Typhoon activity patterns in the Western Pacific during late July and early August will influence whether monsoon systems bring cooler, wetter conditions or whether high-pressure systems dominate. The settlement window closes at 12:00 UTC on 16 August, creating a hard deadline for final price discovery once the actual daily maximum is recorded and confirmed on Weather Underground.

Methodology

We track Highest temperature in Shanghai on August 16? 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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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.

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%.