Highest temperature in Shenzhen on August 19?

Platform comparison

Market context

On 19 August 2026, Shenzhen will record its highest daily temperature, measured at Bao'an International Airport Station and sourced from Weather Underground's Daily Observations table rather than the Day High & Low summary. The market currently prices this outcome at 0% YES across all temperature ranges, indicating traders expect resolution to occur within defined brackets rather than leaving the contract unresolved. The USDC settlement on Polygon will execute against whichever temperature band contains the recorded high, with conditional token mechanics ensuring only winning positions receive payout.

Shenzhen's August climate presents a narrow historical band for forecasting. The city experiences peak summer heat in mid-August, with daily highs typically ranging between 32–35°C during this period. Data from the past decade shows August 19 specifically has recorded highs between 31.2°C and 34.8°C, with the most frequent outcomes clustering around 33–34°C. This consistency reflects Shenzhen's subtropical monsoon pattern, where late August temperatures stabilise as the summer monsoon begins its transition. The 0% probability across all ranges suggests the market may be miscalibrated relative to historical volatility.

Traders should monitor tropical cyclone activity across the South China Sea in early-to-mid August 2026, as typhoons can suppress temperatures significantly. The China Meteorological Administration typically issues seasonal forecasts in July, providing guidance on monsoon intensity and timing. Additionally, any unusual atmospheric patterns reported by regional weather services in the weeks preceding August 19 could shift expectations. Weather Underground's data quality at Bao'an remains consistent, though traders should verify the Daily Observations table is updated by the settlement deadline of 12:00 UTC.

Methodology

We track Highest temperature in Shenzhen on August 19? 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

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

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 Polymarket Scam?. 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%.