Pronóstico: Highest temperature in Shanghai on June 30?

Platform comparison

Market context

The highest temperature recorded at Shanghai Pudong International Airport on 30 June 2026 will determine the outcome of this prediction market, which currently prices a 33% chance of the result falling into the upper temperature bracket. On Polymarket, traders are trading conditional tokens using USDC on the Polygon network, where the contract’s price reflects the crowd’s collective assessment of whether the day’s peak heat will exceed the threshold defined by the market’s resolution rules.

Historically, late June in Shanghai sees daily highs climbing from 77°F to 83°F, rarely dipping below 69°F or exceeding 92°F, with summer peaks regularly surpassing 30°C and occasionally reaching 35°C during intense sunshine[1][6]. This pattern suggests that a 33% probability for the upper bracket is plausible but not guaranteed, as the transition into the hot season (starting 17 June) typically brings sustained highs above 80°F, yet variability remains due to cloud cover and humidity[7].

Traders should monitor the BBC Weather forecast for Tuesday 30 June, which currently predicts a high of 27°C (80°F) with 84% humidity and light east-southeasterly winds[2]. Any sudden shifts in pressure systems or unseasonal cloud cover could suppress peak temperatures, while a clear, dry spell could push readings higher. The resolution source is Wunderground’s official record for ZSPD, so real-time updates from that station will be critical as the settlement window closes at 12:00 UTC on 30 June.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket Argentina, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Polymarket Argentina. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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