Highest temperature in Shenzhen on August 10?

Platform comparison

Market context

Shenzhen’s top temperature will be set by the Weather Underground daily observations for Shenzhen Bao’an International Airport Station, not by the site’s summary high/low box, so late-day updates and any station-level revision matter more than the headline forecast. Current public forecasts cluster around the upper 30s Celsius, with AccuWeather showing 97°F/84°F and timeanddate also pointing to 97°F for the day, which is consistent with a market that can still resolve into the 35°C–36°C band if the airport reaches or slightly exceeds those readings.[9][10][16]

For context, Shenzhen’s August climate is normally hot and humid, with historical August average highs around 32°C to 33°C and many days landing in the low-to-mid 30s Celsius.[3][8][11][18] The recent observed pattern has also been warm enough to support another above-average day: WeatherSpark’s latest airport report showed 95°F at 1:00 pm UTC, while timeanddate’s prior-24-hour history reached 99°F the day before, indicating the local air mass has already produced temperatures at or above the forecast range.[1][2] On a cross-platform basis, the current 0% YES crowd view looks notably lower than the prevailing sportsbook-style forecast lines and the analyst consensus implied by weather services, which all centre on a hot-but-not-extreme outcome rather than a cool surprise.[9][10][13][16]

The main catalysts traders should watch are the airport observations themselves, especially whether peak heat arrives before or after the settlement cut-off and whether cloud cover, showers, or a sea-breeze shift suppresses the daytime maximum. Forecasts from timeanddate and AccuWeather both hint at some late-day showers or cloudier conditions, which would matter only if they cap the day’s top reading before the most favourable heating window.[10][16] In practical terms, the contract is most sensitive to the first official appearance of a station-level high in the chosen Celsius bucket, because even a one-degree change can flip the market between adjacent ranges.

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

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.

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.