Highest temperature in Shanghai on June 27?

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Market context

Shanghai on 27 June 2026 is entering its peak hot and humid rainy season, where daily highs typically climb between 30°C and 35°C on sunny days, while cloudy or rainy conditions usually cap temperatures around 25°C to 30°C[3]. The current crowd-implied probability of 0% for any specific temperature range suggests a market mispricing, as historical data confirms that June highs at Shanghai Pudong International Airport rarely fall below 25°C and frequently exceed 30°C[2][3]. Over the past decade, the average high for June sits at 30°C (81°F), with daily highs increasing by roughly 7°F throughout the month, making a sub-25°C maximum highly improbable under normal conditions[2].

Traders should monitor real-time weather updates from Wunderground for the Shanghai Pudong station, as the market resolves based on the highest temperature recorded at any time on 27 June[5]. A sudden shift to heavy rainfall or persistent cloud cover could suppress temperatures toward the 25°C–30°C band, whereas clear skies would likely push highs toward 33°C–35°C[3]. Additionally, flight operators such as JAL have flagged potential delays or diversions at Shanghai Pudong due to bad weather on 27 June, indicating active meteorological instability that could influence temperature outcomes[6]. No formal injury or suspension news applies here, but the dependency on live atmospheric data remains the critical catalyst for price movement.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Shanghai on June 27? on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

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?

On Champions League Prediction, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Champions League Prediction is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

What does it cost to trade on Champions League Prediction?

Zero. Champions League Prediction routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.

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.