Highest temperature in Shenzhen on July 8?

Platform comparison

Market context

The underlying real-world event is whether Shenzhen Bao'an International Airport records a peak temperature of 31°C or higher on 8 July 2026, yet the market currently prices this outcome at 0% YES, implying traders view the threshold as virtually impossible to breach. This stark pricing contradicts historical climatology, where July is consistently the hottest month in Shenzhen with average daily maximums hovering near 32°C to 33°C based on long-term station data for the Pearl River Delta region[1][3]. Recent records show China endured its hottest July on record with unprecedented average temperatures, and last year the city hit 89°F (31.7°C) on 11 July, suggesting that a 31°C peak is historically typical rather than anomalous[2][4][8].

Traders should monitor the immediate weather forecast for subtropical high pressure systems and potential typhoon activity, as these factors dictate daily precipitation and cloud cover which can suppress peak temperatures significantly[1]. While no specific government announcement is scheduled for this date, the operational dependency remains the Wunderground data feed for the Bao'an station, which must be verified for any sensor anomalies before the settlement window closes at 12:00 UTC on 8 July 2026[1]. The on-chain mechanics on Polygon, settled in USDC via conditional tokens, mean that any deviation from the 0% price will require a rapid influx of liquidity betting against the crowd-implied probability, especially given the recent sweltering conditions across broad swathes of China that exceeded 40°C in other regions[6].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Shenzhen on July 8? 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

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 PolyGram. 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 PolyGram 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.