Highest temperature in Shanghai on June 27?

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Market context

The contract on Polymarket prices the 26°C threshold for Shanghai’s highest temperature on 27 June 2026 at 0% YES, implying the market expects the peak to fall outside that narrow band. This on-chain conditional token, settled in USDC on the Polygon network, reflects a consensus that the day’s maximum will likely exceed 26°C, given Shanghai’s typical June heat.

Historical data frames this probability clearly: daily highs in Shanghai Pudong International Airport during June routinely climb from 77°F to 83°F (25°C to 28°C), rarely dipping below 69°F (21°C) or exceeding 92°F (33°C)[6]. Recent forecasts for June 2026 show highs between 80° and 86°F (27°C–30°C), with overnight lows from 69° to 77°F (20°C–25°C)[7]. BBC Weather confirms Saturday 27 June’s forecasted high at 29°C (85°F), well above the 26°C strike[5].

Traders should monitor the official Wunderground release for the station’s daily peak, as resolution depends solely on that source[1]. Key catalysts include any sudden shifts in cloud cover or wind patterns ahead of the settlement window, which ends 2026-06-27T12:00:00Z. Summer climate in Shanghai regularly exceeds 30°C (86°F), reaching 35°C (95°F) in peak sun, making a 26°C maximum highly improbable[8]. No announcements are expected, but real-time weather updates from the National Weather Service for ZSPD may offer early signals[4].

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). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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 Legit? 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.

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 it cost to trade on Polymarket Legit??

Zero. Polymarket Legit? 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.