Pronóstico: Highest temperature in Shanghai on June 29?

Platform comparison

Market context

The underlying real-world event is the highest temperature recorded on 29 June 2026 at Shanghai Pudong International Airport, a date falling squarely within Shanghai’s hot, humid, and rainy June season. Historical data shows daily highs in June typically climb from 77°F to 83°F (25°C to 28°C), rarely dipping below 69°F (20°C) or exceeding 86°F (30°C), with average wind speeds steady around 11.3 mph and solar energy gradually decreasing through the month[1][5]. On Polymarket today, this contract prices the 29°C outcome at 0% YES, while the frontrunner sits at 27°C with 100% implied probability, mirroring the market’s tight confidence in a sub-30°C peak[2][8]. Comparable June 2025 and 2024 events resolved near 27°C, reinforcing that the current 0% pricing for 29°C reflects a well-calibrated view rather than an outlier[3].

Traders should monitor the 25% risk of thunderstorms forecast for 29 June, as heavy rain and cloud cover typically suppress daytime highs to the 24–26°C range[7]. The key catalyst is the official Wunderground daily record for ZSPD, which will be published after 12:00 UTC on 29 June; any unseasonal heatwave or clear-sky anomaly could push temperatures toward 29°C, though current forecasts suggest 24–26°C[4][5]. On-chain mechanics remain straightforward: USDC settles on Polygon via conditional tokens, with liquidity concentrated in the 26–27°C bins where volume exceeds $4,000[2]. No major weather announcements are scheduled, but the 25°C thunderstorm probability and light rain forecast of 24°C make a 29°C peak highly improbable under current conditions[7].

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

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.

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 Qué Es 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.