Highest temperature in Shanghai on July 18?

Platform comparison

Market context

On 18 July 2026, Shanghai will record a daily high temperature at Pudong International Airport Station. In prediction markets, traders buy YES or NO shares based on whether they think the actual reading will fall within a specific temperature band. A YES share pays out if the settlement condition is met; a NO share pays out if it isn't. This market asks traders to predict which temperature range—likely spanning 5°C increments—will contain that day's peak. The settlement source is Wunderground's historical weather database for that specific station, making the outcome verifiable and objective once the date passes.

Shanghai's July climate is consistently hot and humid, with average daily highs around 32–33°C. Historical data from the past decade shows July extremes ranging from 28°C on cooler days to 39–40°C during heat waves. The 0% crowd probability suggests traders are either uncertain about which temperature band the market offers, or the highest-temperature range available is positioned as an outlier scenario. Comparable July days at Pudong typically fall between 30–36°C, providing a baseline for assessing whether any given range is realistic or speculative.

Traders monitoring this market should track China Meteorological Administration forecasts as July 2026 approaches, particularly any alerts for heat waves or unusual weather patterns across the Yangtze River Delta region. El Niño or La Niña conditions in the preceding months could influence summer temperatures. Real-time weather models from late June onwards will sharpen expectations, though Shanghai's maritime subtropical climate tends to deliver predictable summer heat. The settlement window closes at noon UTC on 18 July, giving traders until that point to adjust positions based on morning forecasts.

Methodology

This page reviews Highest temperature in Shanghai on July 18? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Prediction Market UK, which mirrors the Polymarket order book at 0% fees.

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 Prediction Market UK. 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.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Prediction Market UK 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.