Highest temperature in Shanghai on July 25?

Platform comparison

Market context

Shanghai's highest temperature on 25 July 2026 will be measured at Pudong International Airport Station and resolved against historical records from Wunderground. July is Shanghai's peak summer season, with typical daily highs ranging from 32–35°C, though heat waves occasionally push readings above 37°C. The 0% crowd probability reflects either extreme confidence in a specific temperature band or minimal trading volume on this particular outcome bucket.

Historical July data from Shanghai shows that temperatures exceeding 38°C occur roughly once per decade during the month, whilst readings between 33–36°C represent the modal outcome across most years. The China Meteorological Administration publishes daily forecasts and heat warnings approximately five to seven days in advance; traders should monitor these releases in mid-July 2026 for signals of anomalous heat patterns. Recent summers have seen increased volatility in East Asian temperatures linked to Pacific pressure systems, though seasonal forecasting remains inherently uncertain at the 30-day horizon.

Across prediction platforms, this market's structure differs materially. Kalshi and Betfair typically offer tighter decimal odds on weather markets with lower fees (0.5–2%), whilst Polymarket's AMM-based model may show wider spreads on niche temperature buckets. KYC requirements vary: Kalshi enforces full US residency verification, Betfair accepts international users with looser checks, and Smarkets operates a middle ground. The settlement window closing at 12:00 UTC on 25 July means traders must account for timezone conversion—Shanghai operates UTC+8, so the resolution captures temperatures recorded through local midnight plus twelve hours of UTC buffer.

Methodology

This page compares Highest temperature in Shanghai on July 25? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Kalshi Alternative UK, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

FAQ

Which platform has the deepest liquidity?

Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.

What about Smarkets as an alternative?

Smarkets is a UK betting exchange with a lower default commission (2%) than Betfair. Liquidity on political markets is below Polymarket, comparable to Kalshi. Geo-blocked in many jurisdictions.

Which platform is accessible globally?

Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Kalshi Alternative UK has a different geo footprint and routes to Polymarket's order book at 0% fees.

Are all these platforms regulated?

No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Kalshi Alternative UK offers a fiat on-ramp via Klarna or SOFORT (DE/AT/CH) and converts internally to USDC for the Polymarket order book. T+1 processing.