Pronóstico: Highest temperature in Shenzhen on August 12?

Platform comparison

Market context

Shenzhen will experience peak summer heat on 12 August 2026, with the highest temperature recorded at Bao'an International Airport Station determining settlement. The market currently prices all temperature ranges at 0% probability on Polygon, suggesting either technical settlement delays or minimal liquidity in USDC-denominated conditional tokens. Resolution hinges on Weather Underground's Daily Observations table rather than the Day High & Low summary, a distinction that occasionally produces discrepancies of 1–2°C depending on measurement timing and sensor calibration.

August represents Shenzhen's hottest month, with historical records showing daily highs consistently between 32–35°C. The 2023 peak reached 36.2°C on 13 August, whilst 2022 saw 35.8°C on 9 August. These precedents suggest the market's current 0% pricing reflects either a settlement mechanism issue or traders awaiting clearer liquidity conditions before committing capital. Bao'an Airport's coastal location moderates extreme heat compared to inland districts, though tropical air masses and occasional typhoon-adjacent moisture can drive temperatures toward 37–38°C in rare years.

Traders should monitor China Meteorological Administration forecasts released in early August 2026, particularly any warnings for heat waves or unusual atmospheric patterns. Typhoon activity in the South China Sea during late July could suppress temperatures through cloud cover and precipitation, whilst high-pressure systems from the Tibetan plateau typically intensify heat. Weather Underground's data feed has historically remained reliable for Bao'an Station, though traders should verify the Daily Observations timestamp methodology to avoid settlement disputes tied to measurement windows.

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.

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.

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.