Pronóstico: Highest temperature in Guangzhou on July 25?

Platform comparison

Market context

Guangzhou will experience peak summer heat on 25 July 2026, with the settlement hinging on the single highest temperature recorded at Baiyun International Airport Station that day. Polymarket currently prices all temperature ranges at 0% YES, reflecting the market's nascent state rather than any meteorological consensus. The contract will resolve based on Wunderground's historical weather data for that specific station, with traders required to toggle between Celsius and Fahrenheit depending on their preferred unit. USDC settlement on Polygon means positions are conditional tokens that reflect discrete temperature bands, each with its own price discovery mechanism.

Guangzhou's July climate is remarkably consistent. The city has recorded average highs between 32–34°C throughout the month for the past two decades, with extreme temperatures rarely exceeding 37°C at the airport station. The 2013 heatwave pushed readings to 38.9°C, but such events remain statistical outliers. Most July days cluster within a narrow band, making historical data from Wunderground's archives a reliable baseline for assessing which temperature ranges carry genuine probability versus noise.

Climate forecasting for July 2026 remains preliminary, though seasonal patterns suggest traders should monitor the El Niño–Southern Oscillation phase and regional monsoon intensity as summer approaches. The China Meteorological Administration typically issues extended forecasts by late May, which could shift market pricing if anomalies are flagged. Baiyun Airport's urban heat island effect and its location on the Pearl River Delta mean local conditions can diverge from broader Guangdong province readings, making station-specific historical comparisons more relevant than regional averages.

Methodology

This page reviews Pronóstico: Highest temperature in Guangzhou on July 25? 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.

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.

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.