Highest temperature in Shanghai on July 8?

Platform comparison

Market context

The highest temperature recorded at Shanghai Pudong International Airport on 8 July 2026 will determine the outcome of this prediction market, with the resolution based on Wunderground’s daily high for that date. Historical data shows that July in Shanghai is consistently hot and humid, with average highs between 26–31°C and peaks often reaching 35–38°C. In July 2025, the temperature hit 38°C, and recent forecasts for early July 2026 indicate highs of 34–37°C, suggesting that a temperature above 30°C is highly probable. Given this pattern, the current crowd-implied probability of 0% YES appears misaligned with the region’s typical summer climate, where temperatures routinely exceed 30°C.

Traders should monitor real-time weather updates from Wunderground and AccuWeather, particularly any sudden shifts in cloud cover or precipitation that could moderate peak temperatures. Early July 2026 has already seen scattered clouds and highs of 36°C on 8 July, according to climate-data.org, indicating that conditions are conducive to high temperatures. Additionally, the Shanghai Meteorological Bureau may issue heat advisories if temperatures approach or exceed 35°C, which could serve as a catalyst for market movement. On-chain mechanics on Polymarket, including USDC settlements and conditional tokens on Polygon, allow for precise positioning as new data emerges. With the settlement window ending on 8 July 2026 at 12:00 UTC, timely observation of these dependencies is critical for informed trading.

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Methodology

This page reviews Highest temperature in Shanghai on July 8? 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 PolyGram, 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

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram 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.