Highest temperature in Shanghai on June 29?

Platform comparison

Market context

The underlying event is the peak temperature recorded at Shanghai Pudong International Airport on 29 June 2026, measured in degrees Celsius. Historical data for this location shows daily highs in June typically climb from 77°F to 83°F, rarely dipping below 69°F or exceeding 92°F [1]. Summer conditions regularly push temperatures above 30°C, reaching 35°C during the most intense sunny spells [5]. Given that the current crowd-implied probability for the highest temperature is 0% YES, the market likely hinges on a specific, narrow threshold that June averages consistently surpass, making the "no" outcome statistically probable unless an extreme anomaly occurs.

A power-user approaching this programmatically would monitor real-time weather feeds from Wunderground for the station ZSPD, setting conditional orders to trigger if temperatures breach the resolution threshold. Key catalysts include the forecasted light rain and thunderstorm risk for 29 June, which could suppress peak temperatures, alongside the steady pressure of 1011mb observed at nearby Hongqiao [2]. Traders should watch the 14-day forecast indicating a 25% risk of thunderstorms and light rain of 24°C for the target date, as these dependencies directly impact the maximum temperature [6]. Recent meteorological models confirm June 2026 highs range between 80° and 85°, providing a clear baseline for evaluating the market's binary outcome [7].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Shanghai on June 29? 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 App UK, which mirrors the Polymarket order book at 0% fees.

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.

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.

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