Highest temperature in Guangzhou on August 1?

Platform comparison

Market context

Guangzhou’s August heat profile means the contract hinges on whether Baiyun Airport posts a *daily* top-end reading that is merely typical or a genuine spike. Long-run climate references put the city’s August average high around 32–33°C, with daily highs usually near 91–93°F, but historical and travel guides also show individual August days can push into the mid-30s Celsius and, in extreme cases, towards 37–39°C[1][4][18][20]. Against that backdrop, a crowd-implied 0% YES looks detached from the local seasonal baseline rather than from any meteorological impossibility, especially because the market settles on the **single highest temperature** recorded during the day at Guangzhou Baiyun International Airport Station[12].

For cross-platform comparison, sportsbook-style weather lines would normally sit much closer to the seasonal mean, while prediction markets tend to price the full tail risk around a specific station reading. Recent August forecasts for Guangzhou have clustered around highs of 89–93°F, or roughly 32–34°C, which sits above the average but well below the hotter historical outliers[9][10]. That suggests analyst-style consensus is likely to be in the “hot, but not exceptional” band, whereas a 0% YES on a contract that resolves to the day’s maximum temperature range implies either a data-entry quirk or a market still waiting to reprice a plausible high-temperature outcome[9][18].

Traders should watch the day’s forecast evolution, especially any last-minute change in cloud cover, rainfall, or thunderstorm timing, because Guangzhou’s August weather is humid and rain-prone, and short-lived convective bursts can cap the afternoon maximum even when the broader day looks hot[5][13][20]. The key dependency is the Wunderground station feed for ZGGG, since the market resolves from that specific source rather than from citywide averages or airport-area forecasts[12]. If later forecast updates hold the high near 33–34°C, the contract remains exposed to upside tails; if precipitation arrives early or convection strengthens, the realised maximum can stay closer to the low-30s Celsius band[5][9][20].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Guangzhou 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 Kalshi vs Polymarket, 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 Kalshi vs Polymarket. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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.