Highest temperature in Shenzhen on August 6?

Platform comparison

Market context

Polymarket is pricing this Shenzhen temperature contract at **0% YES**, which means the market is treating a qualifying high at Shenzhen Bao’an International Airport Station on 6 August as effectively out of the money right now. Settlement is tied to the *highest* observed temperature on that date in degrees Celsius, using the Wunderground history page for ZGSZ, so traders are really betting on the day’s peak reading rather than the forecast headline alone.[14]

That zero price sits against a very warm late-summer baseline. Historical and forecast-style climate pages put Shenzhen’s August daytime highs around **32°C** on average, with a normal range broadly in the high-20s to low-30s, while a current Guangdong forecast from the Hong Kong Observatory shows Shenzhen at **26–34°C** for the relevant 24-hour period.[4][6][7][16][19] In other words, the contract is not being priced on an extreme heat event; it is being priced on whether the airport station prints a sufficiently high actual maximum during the settlement window. On a Polymarket perspective, the question is whether the conditional tokens on Polygon ever move from a near-certain *no* into a band where intraday warmth, sunshine, or a delayed peak can matter.

The main catalysts are routine weather factors rather than scheduled announcements: cloud cover, rain bands, humidity, and any late-day convective burst that could cap or lift the maximum. Forecasts for 6 August already show some disagreement, ranging from moderate rain with about **31°C/27°C** to hotter outputs near **33°C/27°C**, which is typical in a monsoon-prone coastal city where conditions can shift quickly.[2][8][10] Traders should watch the airport station observations, not just citywide forecasts, because the market resolves from that specific Wunderground source and the highest reading recorded before the window closes.[14]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Shenzhen on August 6? 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 Kalshi UK, which mirrors the Polymarket order book at 0% fees.

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

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.

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%.