Highest temperature in Guangzhou on July 31?

Platform comparison

Market context

Guangzhou’s late-July heat profile matters more than the title suggests: the contract settles on the day’s **highest temperature at Guangzhou Baiyun International Airport Station**, so the key question is whether the airport briefly gets hot enough to land in a higher Celsius band before any afternoon cloud or rain cools it. Current public forecasts cluster around a high in the low-to-mid 30s Celsius, with AccuWeather showing July highs near 90°F and Weather Atlas putting 31 July around 34°C, while BBC’s airport observation is already near 30°C this morning with very high humidity.[1][2][4]

That backdrop is consistent with Guangzhou’s July climatology, which usually sits around the low 30s Celsius by day and can occasionally spike into the mid-30s, especially when sunshine breaks through before convection builds.[1][11][16] Against that history, a crowd-implied 0% YES looks far below what comparable forecast data would suggest, unless the market is using a higher strike band than the visible forecast implies. On cross-platform odds, sportsbook-style weather lines are not widely available here, so the useful comparison is between the prediction-market price and the forecast consensus, which currently points to a meaningful chance of at least a low-30s outcome.[2][6][7]

Traders should watch the airport’s observed temperature progression through the afternoon, plus any thunderstorm development that can cap the day’s maximum once heating peaks; several forecasts already flag showers or thunderstorms and high precipitation odds, which would favour a lower ceiling if they arrive early.[2][6][7][12] The practical dependency is simple: if Guangzhou Baiyun stays sunny for several hours, the day’s high can overshoot the morning models; if cloud and rain arrive on schedule, the contract is more likely to resolve in a lower band.[2][6][7]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Best Prediction Markets, which mirrors the Polymarket order book directly.

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

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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 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.