Highest temperature in Shanghai on July 5?

Platform comparison

Market context

The real-world event at stake is the peak temperature recorded on 5 July 2026 at Shanghai Pudong International Airport, a critical data point for a prediction market where the crowd currently assigns a 0% probability to any outcome above a specific threshold. Historical patterns for early July at this location show daily highs typically climbing between 30°C and 32°C, rarely dipping below 25°C or exceeding 35°C, with the hottest month of the year averaging 87°F (30.6°C) [1][9]. Summer conditions in Shanghai regularly exceed 30°C, often reaching 35°C during sunny spells, framing the current market odds as a stark divergence from seasonal norms [7].

Traders should monitor ensemble forecasts from global models, which recently indicate a high around 30–32°C for the Pudong station, aligning with trader consensus that 30°C is the leading outcome at 39% implied probability [2]. A key catalyst is the scheduled release of thundery showers and heavy rain forecasts for Hongqiao, which may suppress temperatures at Pudong if the weather system shifts eastward [5]. Recent updates from Polymarket show the market assigning 32% probability to 31°C, suggesting a tight cluster near seasonal averages rather than the extreme heat the 0% crowd-implied probability might erroneously suggest [2][3]. Divergence exists between the sportsbook-style lines on prediction platforms and the 0% crowd view, as global models consistently point to peak readings clustered near 30–32°C, contradicting the current market’s implied dismissal of higher temperatures [2][3].

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

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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 Best Prediction Markets. 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 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.

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 Best Prediction Markets trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.