Highest temperature in Shenzhen on August 10?

Platform comparison

Market context

Polymarket is pricing this Shenzhen temperature contract at **0% YES**, which means the market is effectively assuming the reported peak at Shenzhen Bao’an International Airport will land outside the specified temperature range. For traders holding USDC on Polygon, the key issue is not the forecast headline but the exact value recorded in Weather Underground’s *Daily Observations* table, because that table is the settlement source for the conditional token outcome.

The historical frame is straightforward: Shenzhen is a hot, humid late-summer market, and the recent data point to maximums near the high-30s Celsius range. Weather Underground’s recent Bao’an District history shows highs around 98°F on 8 August, while other historical aggregators put 10 August typical highs in the low-30s Celsius and forecasts around 97°F/36°C. That makes the current zero-price look like a very strong expectation that the recorded high will miss the contract’s target band rather than a view that Shenzhen will be cool in absolute terms.[6][7][8][11]

The practical catalysts are the intraday weather readings, any showers or thunderstorm timing, and whether the airport station gets a cleaner midday spike before cloud build-up or precipitation caps the temperature. Forecast services for Shenzhen on 10 August show warm conditions with some chance of showers later in the day, and the settlement window closes at 12:00 UTC, so the morning-to-early-afternoon local pattern matters most for the highest reading that ends up in the observations table.[11][13][17]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Shenzhen on August 10? 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

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 Kalshi UK. 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%.