Highest temperature in Shanghai on July 6?

Platform comparison

Market context

The contract for Shanghai’s highest temperature on 6 July 2026 at Pudong Airport currently trades at 0% YES on Polymarket, implying the market believes the temperature will fall outside the specified range. This stark pricing contrasts with historical patterns: July at Pudong typically sees daily highs climbing from 84°F to 88°F (29°C to 31°C), rarely dipping below 75°F (24°C) or exceeding 95°F (35°C)[1][5]. Recent data from June 2026 shows highs consistently near 91°F (33°C), suggesting July will be at least as warm[4]. Even the current morning reading of 79°F (26°C) at 5:30 am aligns with a day that will likely peak well above 30°C[3].

Traders should monitor the Shanghai Meteorological Center’s extreme heat announcements and the onset of the monsoon season, which can abruptly suppress temperatures. NDTV recently reported Shanghai experiencing six consecutive days of extreme heat, with a peak of 40.1°C (104.2°F) recorded on Thursday[8]. Such intensity is unusual for early July but signals a high-risk window for temperature spikes. The settlement depends entirely on Wunderground’s hourly record for Pudong Airport, so any data gaps or station-specific anomalies could invalidate the outcome. With USDC liquidity on Polygon and conditional tokens driving price discovery, the 0% YES stance may reflect a mispricing of these extreme-heat catalysts rather than a genuine expectation of cool weather.

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 Legit?. 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.

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.