Highest temperature in Shanghai on July 17?

Platform comparison

Market context

Shanghai is currently experiencing sweltering conditions with a recorded temperature of 95°F (35°C) at 8:30 AM local time, yet the market assigns a 0% probability to any outcome above the lowest tiers, creating a stark divergence from live reality [1]. This pricing suggests the crowd anticipates a rapid cooling event later today, likely driven by the scattered showers and thundery activity forecast to develop from late morning through the afternoon [4]. Historical data for July at Pudong Airport shows daily highs typically ranging between 30°C and 38°C, with extreme peaks occasionally reaching 40°C, meaning a 35°C day is well within the standard seasonal envelope rather than an anomaly [2][7].

Traders should monitor the progression of precipitation and cloud cover, as the forecast indicates hot and humid conditions transitioning to scattered showers that could suppress the afternoon peak temperature [4]. The settlement relies on Wunderground data from the Pudong station, where current METAR reports show broken clouds and a temperature of 27°C at 09:00 UTC, a figure that may rise before the rain arrives [6]. Key dependencies include the timing of the shower front; if rain delays until late afternoon, the temperature could breach the 36°C threshold before cooling, whereas an early onset would cap the daily high significantly lower [4]. The market’s current 0% stance ignores the 64% implied probability for 38°C seen on competing platforms, highlighting a potential mispricing relative to the immediate weather outlook [3].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Shanghai on July 17? 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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Prediction Today 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.