Highest temperature in Shenzhen on August 3?

Platform comparison

Market context

Shenzhen’s highest temperature on 3 August is a late-summer heat-and-rain call rather than a binary heatwave bet, because the contract settles on the single hottest reading at Shenzhen Bao’an International Airport Station, not the day’s average or “feels like” temperature. The crowd is still leaning to the high-20s/low-30s band, with the market’s current 0% YES framing implying that no traded outcome has yet been assigned meaningful probability on the platform, while a separate Polymarket view shows 29°C as the leading bucket at 31% and 28°C at 24%. [6]

That shape is consistent with Shenzhen’s August climatology: multiple forecast guides put typical highs around 32–34°C, but also flag frequent rain, humidity, and a broad daily range that can shave the afternoon peak. AccuWeather’s monthly guide points to daily highs around 91°F, while other August pages cluster around 32°C and note substantial rainfall across the month, which is exactly the sort of setup that can cap the realised maximum below the headline seasonal average. [1][4][5][17]

For traders, the key catalysts are the intraday forecast updates, any thunderstorm or rain-band timing, and whether heat builds before convective clouds arrive; those factors usually matter more than the month-long average. The resolution source is Wunderground’s airport-station history page, so the decisive number will be the highest station reading logged on the date, with late revisions only relevant until the first datapoint for 4 August is published. [6]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Shenzhen on August 3? 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

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

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.

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