Pronóstico: Highest temperature in Shanghai on July 4?

Platform comparison

Market context

On 4 July 2026, the Shanghai Pudong International Airport Station will record its highest daily temperature in degrees Celsius, a figure that will determine the resolution of this Polymarket contract. The market currently prices the "YES" outcome for temperatures above 34°C at 0%, while the frontrunner is "33°C" at 29% and "34°C" at 28%[2][3]. This pricing reflects a conditional token market on the Polygon network, where traders use USDC to speculate on on-chain outcomes tied to real-world weather data from Wunderground.

Historical averages for July at this station show daily highs rising from 84°F to 88°F (roughly 29°C to 31°C), rarely falling below 75°F or exceeding 95°F[1]. The 0% probability for the highest range suggests the crowd expects conditions to align with these typical mid-summer norms rather than the extreme spikes seen recently, such as the 40.4°C peak recorded in Pudong earlier this summer[8]. The 88°F average high (31°C) frames the current 29% chance for 33°C as a modest upward deviation rather than a record-breaking event.

Traders should monitor the Shanghai Meteorological Bureau’s daily forecasts and any announcements regarding heatwaves or ozone levels, which can push temperatures beyond seasonal averages[8]. Recent reports indicate preliminary highs of 40.9°C at the Xujiahui station, demonstrating the potential for sudden extremes[9]. While the settlement window ends on 4 July 2026, the key dependency is the real-time Wunderground feed for the Pudong station, which will confirm whether the day matches the typical 31°C average or spikes toward the 33°C–34°C range priced by the market.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Pronóstico: Highest temperature in Shanghai on July 4? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Polymarket Qué Es, which mirrors the Polymarket order book at 0% fees.

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.

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 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.