Highest temperature in Shanghai on May 30?

Platform comparison

Active sub-markets

Market context

Shanghai's weather on 30 May 2026 will be shaped by the transition into early summer monsoon patterns. Late May typically marks the onset of the East Asian summer monsoon system, which drives warm, moisture-laden air masses northward from the South China Sea. Current atmospheric conditions and seasonal forecasting models will determine whether Shanghai experiences a particularly hot day or remains within normal ranges for the period. The settlement window closes at midday UTC, capturing the full diurnal temperature cycle at Pudong International Airport Station.

Historical records show Shanghai's late-May temperatures cluster between 28–32°C, with occasional peaks above 33°C during particularly intense warm spells. The city's 30-year average high for this date sits near 29°C, though the range reflects considerable year-to-year variability driven by monsoon onset timing and subtropical high-pressure systems. Extreme outliers above 35°C are rare but not unprecedented in this month, occurring roughly once per decade when early-season heat waves establish themselves ahead of schedule.

Traders should monitor long-range weather models released in the weeks leading to the settlement date, particularly those tracking the strength and position of the subtropical ridge over East Asia. Tropical cyclone activity in the Western Pacific can redirect moisture patterns and suppress temperatures, whilst delayed monsoon onset occasionally allows continental high-pressure systems to dominate, driving anomalous heat. Wunderground's historical records for Pudong will provide the definitive resolution source, making station-specific data consistency critical for accurate settlement.

Methodology

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

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

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 Prediction Today?

Zero. Prediction Today 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.