Highest temperature in Shanghai on July 28?

Platform comparison

Market context

Shanghai's summer heat peaks in late July, with the city's subtropical climate producing daily highs routinely exceeding 35°C during this period. The settlement hinges on the single highest temperature recorded at Pudong International Airport on 28 July 2026, measured in Celsius and resolved via Wunderground's historical weather database. Polymarket currently prices this contract at 0% YES across all temperature bands, reflecting either extreme confidence in a specific range or minimal trading activity; the conditional token structure on Polygon means traders must select their preferred temperature bracket upfront, with USDC collateral locked until settlement.

Historical data from Shanghai's meteorological records shows July temperatures typically range between 32°C and 37°C, with occasional spikes to 38°C or beyond during heat waves. The 0% probability across all ranges suggests the market may be illiquid or awaiting more defined price discovery. Comparable July days at Pudong have produced highs of 36–37°C in typical years, though the 2013 heat wave pushed readings to 40.8°C, establishing the upper boundary for extreme scenarios.

Traders should monitor seasonal weather patterns and any emerging atmospheric conditions in late June and early July 2026, particularly the East Asian monsoon system and potential typhoon activity, which can suppress temperatures. China's meteorological bureau releases 10-day forecasts roughly a week before settlement; these updates typically drive repricing in weather markets. El Niño or La Niña conditions, if present, would influence regional temperature anomalies and warrant reassessment of the probability distribution.

Methodology

We track Highest temperature in Shanghai on July 28? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is PolyGram. 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.

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?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.