Highest temperature in Shanghai on July 17?

Platform comparison

Market context

Shanghai is currently overcast at Pudong International Airport with a temperature of 82°F (28°C) and a RealFeel of 89°F, driven by 89% humidity and 27 mph winds. This immediate atmospheric state contrasts sharply with the market’s 0% YES probability, suggesting the crowd anticipates conditions far below any extreme threshold for a high-temperature event on this specific date in 2026.

Historical July data for Shanghai typically sees peak temperatures ranging between 33°C and 37°C, with record highs occasionally exceeding 40°C during heatwaves. The current 0% implied probability implies the market expects a significant deviation from these norms, possibly due to forecasted cloud cover or precipitation suppressing the daily maximum. Programmatic traders should back-test Wunderground’s daily history for ZSPD to identify how often overcast mornings in mid-July have resulted in sub-30°C peaks, using this frequency to validate the zero-probability stance.

Traders monitoring this settlement must watch the hourly updates from Wunderground for the Shanghai Pudong station, as the resolution depends strictly on the highest recorded temperature for all times on 17 July 2026. No external announcements or policy schedules influence this outcome; the sole dependency is the real-time sensor data. A bot script should poll the Wunderground history endpoint every hour once the day begins, flagging any deviation from the expected 30°C+ range to adjust conditional orders before the 12:00 UTC settlement window closes.

Sources: 1

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

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.

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 Polymarket Bot UK 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.