Pronóstico: Highest temperature in Shenzhen on July 7?

Platform comparison

Market context

The underlying real-world event is the highest temperature recorded at Shenzhen Bao'an International Airport on 7 July 2026, measured in degrees Celsius. Polymarket prices this contract today with the current frontrunner at 29°C holding a 26% implied probability, while 30°C sits closely behind at 26% [1]. The market currently assigns a 0% chance to the "YES" outcome for any temperature below 28°C, reflecting a strong consensus that July heat in Shenzhen will be substantial [1].

Historical data frames this probability sharply: July is Shenzhen’s hottest month, with a monthly average high of 32°C and a typical range of 29°C to 32°C [2][3]. Last year, extreme heat saw temperatures reach 47.8°C in exposed areas, though airport readings remain lower [4]. The city’s average July maximum consistently runs well above 30°C, making outcomes below 28°C statistically improbable and aligning with the current 0% pricing for lower ranges [2][5].

Traders must monitor the subtropical high pressure system and typhoon forecasts, as heavy showers averaging 340 mm in July can temporarily suppress peak temperatures [2]. The settlement relies on Wunderground’s hourly data for the Bao'an station, so any cloud cover or rain events scheduled for 7 July will directly impact the resolution [9]. Recent reports confirm China’s extreme weather trends, with national records hitting 52.2°C in 2023, suggesting regional volatility that could influence Shenzhen’s airport readings [8]. Conditional tokens on the Polygon network, settled in USDC, will reflect these on-chain shifts as weather schedules update.

Sources: 1 · 2 · 3 · 4 · 5

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

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 Polymarket Qué Es. 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.

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.

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.