Highest temperature in Shanghai on May 28?

Platform comparison

Active sub-markets

Market context

Shanghai's weather in late May sits within the city's late spring transition period, when temperatures typically range between 25–32°C as the East Asian monsoon system begins its seasonal shift. The settlement window closes at midday on 28 May 2026, capturing the peak heating hours before afternoon thunderstorms commonly develop across the Yangtze River Delta region. Historical data from Shanghai Pudong International Airport shows May daily highs cluster around 28–30°C, though anomalous heat events pushing above 33°C occur roughly once every five to seven years during this month.

The 0% crowd probability reflects the market's current inability to identify a specific meteorological catalyst that would drive temperatures into the highest resolution brackets. Seasonal forecasting models from China's National Meteorological Centre typically issue 10–14 day outlooks by mid-May, which traders should monitor for signals of heat dome formation or tropical air mass intrusion. The absence of any scheduled weather advisory or heat alert from Shanghai authorities as of early 2026 suggests baseline expectations remain anchored to climatological norms rather than extreme scenarios.

Traders should track real-time atmospheric pressure patterns and subtropical high-pressure system positioning in the fortnight preceding the settlement date. Weak monsoon onset or delayed northward progression of the Pacific subtropical ridge could sustain above-normal temperatures. Conversely, early-season tropical cyclone activity in the South China Sea typically channels cooler, moisture-laden air northward, suppressing peak temperatures.

Methodology

Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for Highest temperature in Shanghai on May 28? plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.

Resolution & payout

Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.

Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.

FAQ

Where can I trade this market with the lowest fees?

On Trump Prediction, 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.

What does it cost to trade on Trump Prediction?

Zero. Trump Prediction 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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Trump Prediction triggers a quick verification flow that finishes in 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.