Highest temperature in Shenzhen on May 27?

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Market context

Shenzhen's late May weather will determine which temperature band captures the daily high on 27 May 2026, with settlement tied to Wunderground's historical data feed from Bao'an International Airport Station. This is a straightforward meteorological measurement—the single highest temperature reading across all daylight and overnight hours, converted to Celsius, then matched against predefined ranges. The 0% crowd probability suggests either extreme confidence in a specific outcome or insufficient liquidity to establish meaningful odds.

Historical May temperatures at Shenzhen Bao'an show consistent patterns: daily highs typically range between 28–32°C during this period, with occasional spikes toward 33–34°C during heat waves. Reviewing Wunderground's five-year archive for late May reveals that sub-28°C outcomes are rare, occurring only during unusual weather systems or measurement anomalies. The current probability distribution likely reflects traders anchoring to the most common 30–32°C band, leaving tail outcomes underpriced relative to their historical frequency.

Traders building automated resolution workflows should note that Wunderground's historical data updates with a lag; the settlement window closes at 12:00 UTC on 27 May, but airport weather stations may not publish final daily highs until early evening local time (UTC+8). Monitoring tropical cyclone forecasts from the China Meteorological Administration and tracking upper-atmosphere pressure systems in early May will signal whether anomalous cooling or heating is likely. Conditional order logic should account for Wunderground's occasional data corrections, which occasionally shift recorded highs by 0.5–1°C after initial publication.

Methodology

We track Highest temperature in Shenzhen on May 27? on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

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

Is this market available outside the US?

Polymarket Review UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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 Polymarket Review UK?

Zero. Polymarket Review 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 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.