Highest temperature in Guangzhou on August 14?

Platform comparison

Market context

Guangzhou will experience peak summer heat on 14 August 2026, with the settlement contingent on the highest temperature recorded at Baiyun International Airport Station as logged in Weather Underground's Daily Observations table. The market currently reflects 0% implied probability, suggesting traders assess no meaningful likelihood of the outcome materialising—a positioning that warrants scrutiny given Guangzhou's consistent August temperature patterns and the specificity of the resolution methodology.

August represents the tail end of Guangzhou's monsoon season, though temperatures typically remain elevated. Historical data from the past decade shows daily highs in mid-August clustering between 32–35°C, with occasional spikes toward 36°C during particularly intense heat waves. The 0% probability reading diverges markedly from baseline meteorological expectations for the region during this period, indicating either extreme confidence in a specific temperature threshold or potential confusion regarding the market's range specifications. Without visibility on the exact temperature bands the market employs, traders should cross-reference comparable markets and Weather Underground's historical Baiyun station records to calibrate realistic expectations.

The critical dependency remains the resolution source's fidelity. Weather Underground's Daily Observations table occasionally diverges from summary figures, and tropical systems tracking toward southern China in early August could materially shift temperature profiles. Traders should monitor China Meteorological Administration forecasts and any typhoon activity in the South China Sea during late July and early August 2026, as these represent the primary catalysts for meaningful temperature deviation from seasonal norms.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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 Best Prediction Markets. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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 Best Prediction Markets 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.