Highest temperature in Shenzhen on August 6?

Platform comparison

Market context

Shenzhen’s hottest reading on 6 August will depend on the day’s peak at Bao’an International Airport Station, and the market is currently pricing **0% YES** even though the local weather backdrop still points to a warm, humid summer day rather than a cold anomaly. External forecasts for Shenzhen on 6 August cluster around the low 30s Celsius, with sources showing highs near **31°C to 34°C** and rain or showers in the mix, which is enough to keep the likely outcome in a broad middle band but not obviously outside the market’s settlement range.[2][3][6][8]

Historically, August in Shenzhen is a persistently hot month, with typical highs around **31°C to 32°C** and frequent rainfall, so a single-day maximum in the low 30s is the base case rather than an outlier.[1][17][18][20] That matters for reading the discrepancy between the crowd line and the weather view: if the contract’s ranges are centred on values that would capture a 31–34°C maximum, the **0%** implied probability looks detached from both climatology and published city forecasts, although prediction markets can stay mispriced when the exact settlement source is more specific than broad city forecasts.

The main catalysts are the intraday temperature path, cloud cover, and any shower or thunderstorm timing, because early cloud build-up can cap the afternoon maximum while late-morning sunshine can push the peak up a degree or two.[2][6][10][14] Traders should also watch whether forecast models shift the expected high at the airport specifically, since the contract settles on the **highest temperature recorded** at Shenzhen Bao’an International Airport Station on the day, not the citywide forecast headline.[4][19] Compared with sportsbook-style weather lines, which typically aggregate a simple over/under view, this market is more sensitive to the exact hourly peak and the station-level reading, so any divergence between broad public forecasts and the airport observation matters disproportionately.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Shenzhen on August 6? 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

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 Best Prediction Markets. 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'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.

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.