Pronóstico: Highest temperature in Guangzhou on August 10?

Platform comparison

Market context

Polymarket currently prices this Guangzhou heat contract as a **mismatch with the weather tape**, with the crowd-implied probability at **0% YES** even though the market is tied to a very warm August day at Guangzhou Baiyun International Airport Station. On Polymarket, traders post USDC on Polygon and the contract settles through conditional tokens, so the relevant question is not whether Guangzhou feels hot in general, but which Celsius range captures the station’s highest recorded temperature in the Weather Underground **Daily Observations** table before the settlement window closes. Weather Underground’s live Guangzhou page at 8:00 AM CST showed **97°F / 83°F** and AccuWeather’s same-day guidance pointed to a **100°F** high, or about **38°C**, with hourly temperatures already climbing through the morning.[5][3][4]

Historically, August in Guangzhou is the city’s hottest stretch, with typical daytime highs around **33–34°C** and humidity staying elevated, which makes upper-30s readings plausible when clear or partly cloudy skies persist.[10][14][15] Comparable forecast services for today converge on the same broad band: AccuWeather’s hourly chart reaches **100°F at 3 PM**, while Weather.com.cn and Trip.com both indicate around **36°C** for the day.[4][7][1] For a trader, that matters because the market’s outcome is determined by the actual observed peak at the airport station, not the broader city forecast or any summary high/low display, so the key comparison is between forecast highs in the **36–38°C** area and the exact Daily Observations maximum that appears later in the record.[13]

The immediate catalysts are straightforward: updated station observations through the day, any late-afternoon convective rain that suppresses the peak, and the timing of the final published observation before the next day’s first datapoint appears.[13] At 8:00 AM CST, the Weather Underground station page was already showing a warm baseline, while other forecasters were flagging a hot, mostly dry afternoon with limited rainfall risk, which supports the idea that the decisive move is whether Guangzhou Baiyun tops out at **36°C, 37°C, or 38°C** rather than whether it stays merely above normal.[5][3][4] Because settlement depends on the recorded station data, traders watching the order book are effectively trading the reliability of that afternoon peak against the possibility that cloud cover or showers cap the official maximum below the currently favoured range.[13]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Pronóstico: Highest temperature in Guangzhou on August 10? 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 Qué Es, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

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 Polymarket Qué Es. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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 Polymarket Qué Es trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.