Highest temperature in Shanghai on May 26?

Platform comparison

Active sub-markets

Market context

Shanghai's weather on 26 May 2026 will be measured at Pudong International Airport, with the highest temperature that day determining which range the market resolves to. Late May sits within Shanghai's late-spring period, typically characterised by warming trends ahead of the summer monsoon season. Historical data from the same station shows May temperatures in Shanghai commonly peak between 28–32°C, though anomalies occur. The 0% crowd probability across major platforms suggests either extreme confidence in a specific temperature band or minimal trading volume at present, a pattern worth monitoring as the settlement date approaches.

Shanghai's May weather patterns depend heavily on subtropical high-pressure systems and early-season moisture from the South China Sea. Recent years have seen increasing variability in spring temperatures across eastern China, with some seasons trending warmer than the 30-year average. Traders should track China Meteorological Administration forecasts released in the weeks before 26 May, as these typically influence sentiment on weather markets. Kalshi and Betfair's decimal-odds formats may display this market differently from Polymarket's probability interface, potentially affecting how traders perceive the current 0% reading—a distinction worth checking when comparing odds across platforms.

The settlement mechanism relies on Wunderground's historical data pull from Pudong station, which occasionally shows minor discrepancies with official Chinese meteorological records. Traders should verify the specific station's reporting methodology beforehand, as KYC requirements differ across platforms and may affect access to this market depending on jurisdiction.

Methodology

This page compares Highest temperature in Shanghai on May 26? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. Live odds come from the Polymarket order book; the other venues' contract details are maintained manually because their APIs aren't directly comparable. Every CTA routes to Polymarket Alternative UK, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). Polymarket Alternative UK routes every trade directly into Polymarket's on-chain settlement, which is why payouts land fastest.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket Alternative UK, 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.

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 does it cost to trade on Polymarket Alternative UK?

Zero. Polymarket Alternative UK 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.