Highest temperature in Shenzhen on August 8?

Platform comparison

Market context

Shenzhen Bao’an is forecast to be hot and humid, with the highest temperature for 8 August currently centred around **34–36°C**, while Weather Underground’s hourly page and other live forecasts show afternoon heat building into the low-to-mid 30s Celsius. The market’s **0% YES** implied probability makes this a clear underdog setup for a higher-end outcome only if the station observation jumps above the consensus band, but the main value still looks to sit with the field that covers the forecasted range rather than any extreme upside. [2][6][8][10]

For historical framing, Shenzhen’s August climate is typically very warm, with average highs around **31–32°C** and frequent rain or thunderstorms, which tends to cap runaway heat more often than it creates it. Recent forecast data for 8 August also points to a peak near **35–36°C**, so the market consensus is aligned with a normal-to-hot day rather than a rare spike; that makes contrarian YES positions dependent on a clean, dry, late-afternoon surge at the airport station rather than broad-city conditions. [1][5][17][20]

The catalysts to watch are the **hourly observations at Shenzhen Bao’an International Airport** on Weather Underground, because settlement is based on the **Daily Observations** table, not the headline Day High & Low summary. In practical terms, traders should focus on whether cloud build-up, showers, or thunderstorm activity arrives before the daily peak is logged, since those factors can trim the top reading even when the wider forecast stays hot; current live guidance already shows a chance of evening thunderstorms, which supports the under side of the distribution. [2][3][8]

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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 2026. 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.

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.

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.