Highest temperature in Shanghai on June 29?

Platform comparison

Market context

On 29 June 2026, the Shanghai Pudong International Airport Station will record its peak temperature, a real-world event that determines the outcome of this prediction market. The crowd-implied probability for a YES result sits at 0%, suggesting the consensus believes the temperature will not reach the specified threshold. Historically, June at Pudong sees daily highs climbing from 77°F to 83°F, rarely dropping below 69°F or exceeding 92°F, with summer highs regularly surpassing 30°C and occasionally hitting 35°C during sunny spells. This pattern frames the current probability as potentially mispriced, as the underdog (the higher temperature range) has a credible historical foundation that the favourite (the lower range) may be ignoring.

Traders should monitor the immediate weather schedule for light rain and thunderstorm risks, which are forecast for Monday 29th with temperatures around 29°C and high humidity at 84%, as these conditions could suppress peak heat. The key catalyst is the arrival of thundery weather expected on Tuesday 30th, which may indicate a shifting atmospheric pattern that could either cool or intensify conditions on the settlement day. Recent data from AccuWeather confirms June 2026 highs ranging between 80°F and 85°F, while the Weather Network notes a 25% risk of thunderstorms on the 29th, creating a value spot for contrarian angles betting on the higher temperature range if the rain fails to fully dampen the heat. The implied 0% probability appears to overlook the variability inherent in Shanghai’s summer climate, offering a potential value opportunity for those willing to bet against the consensus.

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 Who Will Win, 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 Who Will Win. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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.