Highest temperature in Chongqing on July 27?

Platform comparison

Market context

Chongqing's summer temperatures regularly exceed 35°C, with July typically the hottest month across the municipality. The Jiangbei International Airport Station, the official measurement point for this market, sits in an urban heat-island zone that consistently records higher maxima than surrounding areas. Historical data from Wunderground shows July 27th has seen peaks ranging from 32°C to 39°C over the past decade, reflecting the city's vulnerability to both seasonal heat and episodic heatwave conditions driven by Pacific anticyclones.

The 0% crowd probability suggests either extreme confidence in a specific temperature band or insufficient liquidity across the full range. For programmatic traders, this presents a calibration challenge: automated systems monitoring China Meteorological Administration forecasts and real-time satellite data would need to reconcile multiple temperature sources before settlement. Wunderground's historical records occasionally show minor discrepancies with official CMA readings, requiring conditional logic to handle edge cases near range boundaries.

Traders should monitor mid-July weather pattern forecasts from June onwards, as the East Asian summer monsoon positioning determines whether Chongqing experiences typical heat or anomalous cooling. Recent patterns (2023–2024) show increasing volatility in peak temperatures during this period. The settlement window closes at noon UTC on July 27th, creating a hard cutoff for intraday temperature movements—any spike occurring after 20:00 local time would fall outside the resolution window, making timing-dependent strategies relevant for late-month positioning.

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.

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.

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 Polymarket Review 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.