Highest temperature in Shenzhen on August 17?

Platform comparison

Market context

Shenzhen will experience peak summer heat on 17 August 2026, with the highest temperature recorded at Bao'an International Airport Station determining the settlement outcome. The market resolves against Weather Underground's Daily Observations table—the granular, station-level dataset rather than the rounded summary figures—making data source verification critical for traders building automated resolution checks.

Historical August temperatures in Shenzhen cluster between 32–35°C, with extremes occasionally reaching 36–37°C during particularly intense heat waves. The 0% crowd probability suggests either extreme confidence in a specific temperature range or insufficient liquidity drawing serious traders. Comparable coastal South China markets show that August highs rarely breach 38°C; the 2015 heat wave peaked at 36.8°C at Bao'an. Traders should cross-reference historical station data directly from Weather Underground's archives rather than relying on summary forecasts, as the resolution mechanism explicitly privileges the Daily Observations table.

Relevant catalysts include tropical cyclone activity in the Western Pacific during mid-August, which could suppress temperatures through cloud cover and precipitation, and the phase of the East Asian summer monsoon. The China Meteorological Administration publishes 10-day forecasts fortnightly; the 7–10 August forecast window will provide the most actionable signal for positioning. Traders implementing conditional orders should establish data-fetch logic targeting the specific Bao'an station identifier on Weather Underground, as the platform hosts multiple Shenzhen weather stations with occasionally divergent readings. Settlement timing at 12:00 UTC on 17 August allows for same-day verification once the station's daily observation closes.

Methodology

This page reviews Highest temperature in Shenzhen on August 17? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Polymarket Review UK, which mirrors the Polymarket order book at 0% fees.

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

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.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

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%.