Highest temperature in Shenzhen on August 4?

Platform comparison

Market context

Shenzhen’s airport temperature on 4 August is a weather-range market, and the present **0% YES** crowd price looks detached from the climatology for early August. Shenzhen sits in a humid subtropical zone, with August typically among its hottest and stickiest months; several forecast services put the day’s high around **31–32°C**, with some upside if showers clear earlier than expected.[4][18][10] In other words, the live market is pricing no meaningful chance of the higher temperature bins that would normally be in play for a summer afternoon at Shenzhen Bao’an.[6][12]

Historically, comparable Shenzhen August readings tend to cluster in the low 30s rather than extreme heat spikes, which matters because this contract settles on the **highest recorded temperature** at the airport station, not an averaged or “feels like” value.[12][20] Across the comparison set, the prediction market is materially tighter than generic weather views: Polymarket’s own contract snapshot showed the leading outcomes centred on **31°C** and **32°C**, while public forecast pages and monthly normals point to highs in the low 30s, not anything near a cold outcome that would justify a zero-price view.[6][4][18] That makes the current crowd-implied probability a clear outlier against the broader temperature consensus, even before accounting for intraday maxima.

For traders, the main catalysts are the day-of temperature path, rainfall timing, and any late updates to the airport station observation on Wunderground, since the market resolves to the station’s recorded peak by the settlement cutoff.[2][12] Rain is the key suppressor: current public forecasts for Shenzhen show moderate rain or showers for 4 August, which can cap the daytime high, but forecast revisions through the morning and early afternoon can still shift the likely top bin by 1°C.[2][7][15] The practical comparison is therefore simple: sportsbook-style weather lines and forecast sites are leaning to a low-30s high, the prediction market is effectively discounting the event to nothing, and the consensus sits much closer to the forecast services than to the crowd price.[2][6][15]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Shenzhen on August 4? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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 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 Best Prediction Markets UK 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.