Highest temperature in Shanghai on July 10?

Platform comparison

Market context

The underlying event is the peak daytime temperature recorded at Shanghai Pudong International Airport on 10 July 2026, measured in degrees Celsius. Historical data confirms July is Shanghai’s hottest month, with average highs near 87°F (31°C) and frequent peaks exceeding 95°F (35°C) during sunny spells [3][6]. Current 2026 forecasts for the station show daily highs ranging from 86°F to 97°F (30°C to 36°C), with overnight lows between 77°F and 81°F (25°C to 27°C) [2]. Given this consistent thermal pattern, a 0% implied probability for the contract’s specific range appears statistically divergent from both the historical baseline and the analyst consensus on near-term weather models.

Traders should monitor the hourly weather updates from Wunderground and the shortwave solar energy trends, which are gradually increasing through July and could push temperatures toward the upper forecast band [1]. The primary catalyst is the afternoon cloud cover and wind speed; current models indicate light rain showers and gusty winds may arrive on 11 July, potentially moderating the peak on 10 July if the system shifts earlier [10]. Recent regional forecasts from BBC Weather also highlight a shift to gusty winds and rain for the weekend, a dependency that could invalidate the current odds if the precipitation arrives sooner than expected [7]. The divergence between the 0% market price and the 30–36°C forecast range suggests a significant pricing inefficiency for cross-platform odds comparison.

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

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

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.

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.

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.

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.