Pronóstico: Highest temperature in Shanghai on July 11?

Platform comparison

Market context

Shanghai Pudong International Airport faces a sweltering July 11, 2026, where historical data confirms daily highs routinely exceed 30°C, often reaching 35°C during peak sunshine [2][6]. The current crowd-implied probability of 0% YES on Polymarket suggests traders believe the temperature will fall outside the specific range defined in this contract, despite July being the hottest month of the year with an average high of 87°F (30.5°C) [1][2]. This pricing anomaly likely stems from the contract’s narrow resolution band rather than a belief that the day will be cool, as summer climate regularly sees temperatures surpassing 86°F [6].

Traders monitoring this on-chain USDC market on Polygon should watch real-time Wunderground updates for the ZSPD station, the official settlement source, as thunderstorms forecast for the region could suppress peak temperatures [5][10]. Recent forecasts indicate heavy precipitation and gusty winds on Thursday, with a low chance of rain persisting into Saturday, potentially capping the maximum heat [5]. While no specific government announcements are pending, the dependency on hourly meteorological data means any sudden shift in cloud cover or rain intensity will directly impact the conditional token valuation before the 2026-07-11T12:00:00Z settlement window closes.

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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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.

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.