Highest temperature in Shanghai on May 28?

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Market context

Shanghai's weather on 28 May 2026 will determine which temperature band captures the day's peak reading at Pudong International Airport. The market currently prices all outcome ranges at zero, reflecting the settlement window's distance and the inherent difficulty in pricing weather events fourteen months ahead. On Polygon, traders would deploy USDC to acquire conditional tokens representing specific temperature brackets, with payouts determined by Wunderground's historical data for that date.

May in Shanghai typically sits within the onset of the pre-monsoon season, when daily highs range between 28–32°C depending on atmospheric patterns. Historical records from the past decade show late May temperatures occasionally exceeding 33°C during heat waves, though sustained peaks above 35°C remain uncommon before June's full arrival. The 0% crowd probability likely reflects rational uncertainty rather than conviction that extreme heat is impossible; early-season pricing often defaults to neutral positions when sufficient historical variance exists across comparable dates.

Traders monitoring this contract should track China's meteorological forecasts from late April onwards, as seasonal pattern shifts and El Niño or La Niña conditions can materially alter May's thermal profile. The China Meteorological Administration typically issues extended outlooks six to eight weeks in advance. Additionally, any significant volcanic activity or stratospheric aerosol events between now and May could suppress temperatures, though such catalysts remain speculative. The settlement mechanism's reliance on Wunderground's Pudong station data means localised airport microclimates—including heat island effects from tarmac and infrastructure—will influence the final reading rather than broader Shanghai conditions.

Methodology

We track Highest temperature in Shanghai on May 28? 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 Scam? 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 does it cost to trade on Polymarket Scam??

Zero. Polymarket Scam? routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket Scam? 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.