Highest temperature in Shanghai on August 1?

Platform comparison

Market context

Shanghai’s midday heat is the live variable Polymarket is pricing, but the contract settles on the **highest** temperature recorded at Shanghai Pudong International Airport Station by Wunderground, not the citywide average. With the market sitting at **0% YES**, the implied read is that traders are assigning almost no weight to the station printing into the higher temperature bands before the settlement window closes on Polygon in USDC via conditional tokens.

The historical frame argues against treating August 1 as a low-volatility date. Shanghai is typically in its hottest stretch in August, with average highs around **31–32°C** and repeated daily readings above **30°C** in seasonal summaries, while individual August records have reached the **mid-30s** and above in comparable datasets.[1][2][5][17] Broader Shanghai heat extremes have also exceeded **40°C** in past city records, which matters because airport readings can still move sharply on clear, humid summer days even when the broader forecast looks ordinary.[7][10]

For traders, the key catalysts are the local forecast cycle, heat warnings, cloud cover, rainfall timing, and any monsoon or typhoon influence over the Yangtze River Delta, since these directly affect the day’s peak observation rather than the average temperature.[8] The practical watchlist is simple: the airport station’s hourly run-up before local afternoon heating, whether precipitation or convective cloud suppresses the maximum, and whether Shanghai’s meteorological authorities issue heat alerts that signal persistent extreme warmth.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Shanghai on August 1? 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 PolyGram, 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.

FAQ

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.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.