Highest temperature in Shanghai on August 7?

Platform comparison

Market context

Polymarket is pricing this Shanghai airport temperature contract at **0% YES** today, even though the underlying event is simply whether the Shanghai Pudong International Airport Station logs the market’s specified peak temperature band on 7 August. On Polymarket, the position is settled in **USDC** and transferred through **Polygon** using conditional tokens, so the live price reflects traders’ view of the odds of Wunderground printing a qualifying high before the settlement window closes at 12:00 UTC.

That 0% reading sits against a climate backdrop that is normally hot enough to keep upper temperature bands in play. Shanghai’s August averages are typically around the low-30s Celsius on daytime highs, with several forecast providers showing highs in the 32–35°C area for early August 2026, while news coverage in the city has described an active heatwave with temperatures expected to reach the high-30s and an orange alert issued locally.[1][2][7][9] For a market like this, the key point is that airport observations can differ from citywide forecasts, so traders should focus on the actual Wunderground station reading rather than broad Shanghai averages.[11]

The main catalysts are the same ones that usually move a weather market: short-term forecast revisions, thunderstorm timing, cloud cover, and whether the subtropical high weakens or strengthens over the day. Current public forecasts already show some inconsistency on showers versus strong heat, which matters because brief storms can cap the daily maximum even when the broader setup is hot.[2][9][16] The practical on-chain angle is that any new information must be digested quickly by market makers in the conditional-token order book, with prices on Polygon able to re-rate sharply if the airport station starts tracking a hotter or cooler path than the consensus forecast.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Shanghai on August 7? 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 Alternative 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?

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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.

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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%.