Highest temperature in Guangzhou on August 1?

Platform comparison

Market context

Polymarket is pricing **0% YES** for Guangzhou’s highest temperature on 1 August, which means the market is effectively saying the Guangzhou Baiyun International Airport Station will not land in the contract’s tracked temperature band on that day. On Polymarket, traders are buying and selling **USDC-settled conditional tokens** on Polygon, so the live price is the market’s own shorthand for where the final Wunderground-reported maximum may end up, not a forecast of comfort or heat in the city generally.

For context, Guangzhou’s August climate is normally hot and humid, with average highs around **32–33°C** and monthly August highs often in the low-to-mid 30s Celsius. Travel guide and climate-history sources show that early-August afternoons can still spike into the mid-30s, with one historical August listing putting 1 August at **33.5°C** and nearby dates higher, while broader averages cluster around **33°C**. That matters because a 0% print is only justifiable if the contract band is either very far from the typical range or the market is anchoring on a low-probability tail outcome rather than the seasonal norm.

The key catalysts are straightforward: the afternoon peak itself, cloud cover, rain bands, and whether the airport station runs cooler than the wider city under convective showers or sea-breeze effects. Guangzhou’s August weather is typically rainy, with monthly precipitation near **270–300 mm** and frequent rain days, so a passing storm can cap the day’s maximum even when the broader heat pattern remains strong. Traders should watch the local forecast through the morning and early afternoon UTC, then verify the Wunderground history page after the daily maximum is recorded, because that final airport-station reading is what will determine settlement.

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 Kalshi UK, 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

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 UK. 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 Kalshi UK 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.