Pronóstico: Highest temperature in Shenzhen on July 8?

Platform comparison

Market context

The underlying real-world event is the highest temperature recorded at Shenzhen Bao'an International Airport on 8 July 2026, measured in degrees Celsius. Historical data for Shenzhen in July shows a monthly average high of 32°C, with 17 rainy days and significant precipitation due to the subtropical high and typhoon activity [1]. While the average daily maximum in the Pearl River Delta region sits near 33°C, recent records indicate China experienced its hottest July on record, with temperatures averaging 23.21°C nationally in 2024, eclipsing the 2017 benchmark [9]. However, the current crowd-implied probability of 0% for a specific threshold suggests traders view the likelihood of an extreme spike above that level as negligible, possibly due to the high probability of rain and cloud cover typical for this period [1].

Traders should monitor the daily weather forecast and any announcements regarding typhoon development, as heavy showers and intense falls are common in July and would suppress peak temperatures [1]. The settlement relies on data from Wunderground for the Bao'an station, so any gaps in that specific feed or discrepancies between the station and regional averages could impact the resolution [8]. With the settlement window ending on 8 July 2026 at 12:00 UTC, the on-chain mechanics on Polymarket utilise USDC on the Polygon network, where conditional tokens determine the payout based on the final temperature range [4]. The key catalyst is the immediate weather outlook for the Bao'an station, as a clear sky is required to breach higher temperature thresholds, but the historical prevalence of 17 rainy days makes such conditions less probable [1].

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

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

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 Polymarket Qué Es 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.