Highest temperature in Shanghai on July 18?

Platform comparison

Market context

Shanghai's peak daily temperature on 18 July 2026 will be recorded at Pudong International Airport Station and resolved against historical weather data. The 0% crowd-implied probability reflects the market's current state rather than meteorological certainty; July is Shanghai's hottest month, with mean daily highs consistently exceeding 32°C and occasional peaks above 37°C. The settlement window closes at midday UTC, creating a narrow resolution window that depends entirely on actual recorded conditions at the designated weather station.

Historical July temperatures at Shanghai Pudong show considerable variance. Over the past decade, mid-July highs have ranged from 29°C to 38°C, with frequencies clustering around 33–35°C. The 2013 heat wave pushed readings to 40.6°C, whilst cooler years saw peaks near 30°C. This volatility suggests the market's current zero probability may reflect either illiquidity rather than genuine forecasting consensus, or traders awaiting clearer seasonal patterns as the date approaches. Comparable prediction markets on Asian summer temperatures typically show meaningful probability mass across multiple temperature bands rather than concentration at zero.

Traders monitoring this contract should track China Meteorological Administration forecasts released in early July 2026, which typically provide 10-day outlooks with reasonable accuracy for Shanghai. Tropical cyclone activity in the Western Pacific during mid-July could suppress temperatures significantly, whilst high-pressure systems would elevate them. The specific timing of any weather system relative to 18 July will determine whether outcomes cluster in moderate or extreme ranges. Current zero probability likely reflects early-market thinness rather than meteorological consensus.

Methodology

We track Highest temperature in Shanghai on July 18? 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 Best Prediction Markets UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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 Best Prediction Markets UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.