Highest temperature in Shanghai on July 15?

Platform comparison

Market context

Shanghai is currently experiencing mid-summer heat, with the Shanghai Pudong International Airport recording a maximum temperature of 35ºC today as broken clouds and moderate winds shape the immediate conditions[1]. The market asks whether the peak temperature on 15 July 2026 will fall into a specific range, yet the crowd-implied probability sits at 0% for the YES outcome, suggesting traders view the target range as virtually impossible given the station’s historical performance.

Historical data from recent Julys in Shanghai shows peak temperatures routinely reaching 35–38ºC, with the city’s humid subtropical climate driving consistent high heat during this period. A 0% probability implies the market expects the temperature to fall outside the offered range entirely, likely because the range is set too low (e.g., below 30ºC) or too high (e.g., above 40ºC) relative to typical July maxima. In comparable cases, markets with 0% implied probability on weather extremes often misprice the likelihood of record-breaking days driven by sudden heat dome events or unusual atmospheric stagnation.

Traders should monitor the daily Wunderground history for ZSPD as the settlement source, watching for any sudden shifts in the 15 July forecast from meteorological agencies like the China Meteorological Administration. A contrarian angle exists if a heat dome forms over the Yangtze River Delta, pushing temperatures beyond consensus expectations; recent news from the Shanghai Meteorological Bureau highlights increased vigilance for extreme heat events in July 2026 due to rising regional temperatures[1]. The value spot may lie in betting against the 0% line if forecast models indicate a high-probability heat spike, treating the current price as an underdog mispricing rather than a true favourite lock.

Sources: 1

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Who Will Win, which mirrors the Polymarket order book directly.

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 Who Will Win. 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 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.