Highest temperature in Chongqing on July 27?

Platform comparison

Market context

Chongqing’s airport station is in a hot, humid summer climate, and late July is normally within the city’s rainiest stretch, even though August is typically the driest month of the warm season. July averages around 33°C for daytime highs, with heavy thunderstorms mixed in, so the market is really pricing the *peak* reading on a single day rather than a typical afternoon. [2][3]

With the crowd-implied probability at **0% YES**, the consensus is effectively that the observed maximum will fall outside the “yes” band the market is considering, which makes the favourite the broad middle of the temperature distribution rather than an extreme print. By comparison, the live market elsewhere has been clustering around the upper 30s, with **39°C** currently the leading outright temperature outcome and **38°C** next, so the value question is whether the day runs slightly cooler than the most bullish traders expect or spikes into a higher bracket if the heat ridge holds. [4][2]

For traders, the main catalysts are the local afternoon weather pattern, cloud cover, and whether any showers or thunderstorms arrive early enough to cap the high before peak heating. Chongqing’s July rain profile is non-trivial, with multiple heavy thunderstorm days typical in the month, so a convection-heavy day can make the underdog temperature bands more competitive even in a generally hot setup. The key dependency is the recorded maximum at Chongqing Jiangbei International Airport Station on Wunderground, not citywide averages, so a brief airport-specific rain or gust front can matter more than the broader municipal forecast. [2][3]

Sources: 1 · 2 · 3 · 4

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Who Will Win 2026 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.