Highest temperature in Beijing on July 25?

Platform comparison

Market context

Beijing's summer temperatures regularly exceed 35°C in late July, with the city's monsoon season and urban heat island effect driving afternoon highs well into the upper 30s. The settlement window closes at midday UTC on 25 July 2026, meaning traders are forecasting the peak temperature recorded at Beijing Capital International Airport Station—the official meteorological reference point—during daylight hours before noon. Historical records show July 25 has seen temperatures ranging from 29°C to 37°C over the past two decades, with most years clustering between 33°C and 36°C.

The 0% implied probability across major platforms suggests either a technical issue with market creation or extreme confidence that temperatures will fall outside the highest-temperature brackets offered. Kalshi's strict US-regulated settlement and Polymarket's broader international reach create divergent trader bases for weather markets; Kalshi typically enforces tighter position limits on weather contracts, whilst Polymarket's decimal odds format and lower KYC friction in some jurisdictions may attract different volume patterns. Betfair and Smarkets, with their commission-based fee structures, often show sharper price discovery on niche weather markets than fixed-spread books, particularly when implied probabilities cluster at extremes.

Traders should monitor China Meteorological Administration forecasts released in the week preceding 25 July, as well as any tropical cyclone activity in the Western Pacific that could suppress temperatures through cloud cover and precipitation. The settlement source—Wunderground's historical data for ZBAA station—is publicly accessible and rarely disputed, reducing counterparty risk compared to some weather markets reliant on single-source reporting.

Methodology

This page compares Highest temperature in Beijing 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 Robinhood Prediction Markets, 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

Polymarket vs Kalshi — which is better?

Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.

What does Polymarket cost vs Kalshi?

Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.

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.

Which platform is accessible globally?

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

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Robinhood Prediction Markets 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.