Highest temperature in Shenzhen on August 1?

Platform comparison

Market context

At Shenzhen Bao'an International Airport, the day’s **high temperature** is the key number, and the market’s current **0% YES** implies the crowd is treating an August 1 outcome in the target range as essentially impossible. The underlying weather backdrop argues the opposite: August in Shenzhen is normally hot, with typical highs around **32°C–32.2°C** and daily highs often near **89°F–90°F**. That makes the market a classic favourite/underdog setup, with the underdog effectively priced as if a routine summer reading will fail to show up.[2][5][10]

Historically, Shenzhen’s early-August temperatures are frequently in the low- to mid-30s Celsius, and some guides record **1 August** highs around **36°C** in past years, showing that a hot print is not exceptional for the date. By comparison, weather-history averages for the month put **1 August** close to **90.5°F** at the high, while broader August climatology clusters around **89°F–90°F**. On that framing, the consensus appears to be anchored below the seasonally normal range, which leaves value to the contrarian side if the airport station runs even modestly warmer than average.[1][4][5]

The main catalysts are synoptic rather than event-driven: cloud cover, afternoon convection, sea-breeze moderation, and any tropical disturbance in the South China Sea can all cap the daytime maximum or shift the peak earlier. Shenzhen weather guides also flag August as a humid, rain-prone month with a meaningful typhoon risk, so traders should watch official local forecasts and any tropical-cyclone advisories that could suppress the airport’s maximum temperature. No special calendar announcement is needed for resolution; the settlement source is the Wunderground daily history page for Shenzhen Bao’an International Airport, so the key dependency is the observed max there before the midday UTC cutoff.[18][10]

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

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 Who Will Win. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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 Who Will Win trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.