Highest temperature in Shenzhen on July 8?

Platform comparison

Market context

On 8 July 2026, the Shenzhen Bao'an International Airport Station will record its peak temperature for the day, a metric that determines the outcome of a prediction market where the crowd currently assigns zero per cent probability to the temperature reaching 31°C. This stark divergence between market sentiment and historical reality is notable, as climatological data for Shenzhen in July consistently shows average daily maximums hovering near 32°C to 33°C, with recent years experiencing record-breaking heat across the Pearl River Delta region[1][4]. While sportsbooks and analyst consensus often align with the long-term average high of 32°C, the prediction market’s implied probability of zero suggests a potential mispricing or an overreaction to short-term cloud cover forecasts that may not materialise[1][2].

Traders must monitor the subtropical high pressure system and any incoming typhoon activity, both of which are primary catalysts for temperature fluctuations in Shenzhen during this month[1]. Recent reports indicate China experienced its hottest July on record last year, with peak temperatures surging past 89°F, establishing a precedent for extreme heat that contradicts the current market’s bearish stance[5][7]. The resolution depends entirely on Wunderground’s hourly data for the airport station, meaning traders should watch for real-time updates on the gear icon temperature setting and any sudden shifts in wind patterns that could suppress the daily maximum[1]. Given the historical trend of 17 rainy days in July and average precipitation of 340 mm, a clear day without heavy showers would likely push temperatures toward the 32°C–33°C range, challenging the zero per cent probability line[1].

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 vs Polymarket, which mirrors the Polymarket order book directly.

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

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.

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 Kalshi vs Polymarket 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.