Pronóstico: Lowest temperature in Shanghai on July 19?

Platform comparison

Market context

Shanghai's lowest temperature on 19 July 2026 will be recorded at Pudong International Airport Station and settled against Wunderground historical data. The market currently prices this event at 0% across all temperature ranges, reflecting the settlement window's closure on 12:00 UTC that day—meaning traders are pricing in near-total uncertainty about which bracket will ultimately contain the recorded low. On Polygon, this conditional token contract settles in USDC once the lowest temperature is verified, with each range bucket representing a discrete outcome.

July in Shanghai typically sees daily lows between 24–28°C, with occasional dips to 22–23°C during cooler spells or after thunderstorms. Historical data from the past decade shows that temperatures below 20°C on mid-July dates are exceptionally rare, occurring perhaps once every five to ten years. The 0% probability across all ranges suggests the market may be pricing in settlement ambiguity rather than reflecting genuine uncertainty about Shanghai's July climate patterns. Traders should cross-reference Wunderground's historical records for 19 July across multiple years to calibrate expectations around typical lows for this specific calendar date.

Catalysts affecting the outcome include the East Asian summer monsoon's intensity in early-to-mid July 2026 and any tropical cyclone activity in the Western Pacific that could drive cooler air masses into the Yangtze River Delta region. China's meteorological agencies publish 10-day forecasts in early July; monitoring these alongside sea-surface temperature anomalies in the South China Sea will help traders assess whether conditions favour above or below-average lows for the date.

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 Polymarket Qué Es. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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 Polymarket Qué Es 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.