Highest temperature in Chengdu on July 27?

Platform comparison

Market context

Chengdu has started the day with rain in the forecast rather than a clean heat build-up, and the latest local guidance still points to a modest top end rather than an extreme spike. Weather.com.cn has Monday’s high at 29°C with showers, while live observations around Chengdu are much cooler at 24°C, which fits a damp, cloudier opening than the market would need for a very hot reading.[1][2]

That matters because Chengdu’s July climate is usually hot and sticky, but also prone to abrupt convective rain that can cap daytime highs. Seasonal guides describe typical July highs around 30–31°C, with some hot days reaching the high 30s, yet they also note frequent heavy downpours and thunderstorms that interrupt heating; in other words, the city can produce a sharp spike, but persistence of cloud and rain is the better default.[6][9][11]

For traders, the key catalysts are the day’s rain timing, cloud cover, and whether any midday clearing develops before the airport station posts its maximum. The settlement source is Chengdu Shuangliu International Airport, so the market is more sensitive to conditions at the airport than to headline city forecasts; a short sunny break can lift the max quickly, but a rain band or persistent overcast keeps the ceiling lower.[12][1] Current broad forecast services are aligned around showers and high humidity, which leaves the day’s highest temperature dependent on whether the afternoon warms enough to overcome the damp start.[1][5]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Chengdu on July 27? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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 Prediction Today. 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.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Prediction Today 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.