Highest temperature in Shenzhen on August 17?

Platform comparison

Market context

Shenzhen's August weather patterns show consistent heat, with daily highs typically ranging between 32–34°C during mid-August. The 0% crowd probability suggests traders are pricing in an expectation that the highest temperature recorded at Bao'an International Airport on 17 August 2026 will fall below the lowest available temperature bracket in this market's resolution structure. This positioning reflects either an unusually conservative reading of summer conditions in the Pearl River Delta or uncertainty about which specific temperature bands the market offers.

Historical data from the past decade indicates that Shenzhen rarely experiences August days without peak temperatures exceeding 30°C. The city's coastal location and urban heat island effect typically drive afternoon highs into the low-to-mid 30s Celsius range throughout the month. August 2023 recorded daily maximums of 33–35°C during comparable dates, whilst August 2022 saw similar patterns. These precedents suggest the crowd's current pricing may underestimate the likelihood of moderate-to-warm outcomes.

Traders should monitor the China Meteorological Administration's forecasts as mid-August 2026 approaches, particularly any alerts regarding tropical systems or unusual pressure patterns that could suppress temperatures. The resolution will depend on readings from the Daily Observations table at Weather Underground for Shenzhen Bao'an International Airport Station, which may occasionally diverge from summary figures. Any significant weather system tracking towards southern China in early August could shift expectations, though the seasonal baseline remains firmly in the warm range.

Methodology

We track Highest temperature in Shenzhen on August 17? 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

Is this market available outside the US?

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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%.