Highest temperature in Beijing on August 11?

Platform comparison

Market context

Beijing's peak temperature on 11 August 2026 will be measured at the Capital International Airport Station and resolved against Weather Underground's Daily Observations table rather than its summary display. The 0% implied probability reflects either extreme confidence in a specific temperature range or minimal trading activity on this particular settlement window. Cross-platform comparison reveals structural differences: Polymarket displays decimal odds alongside implied probability, whilst Kalshi and Betfair present odds in American and fractional formats respectively, each affecting how traders perceive edge on niche weather contracts. Smarkets' commission structure differs from fixed-fee models, which can meaningfully impact profitability on low-liquidity markets like this one.

August temperatures in Beijing typically range between 26–32°C, with historical data from the China Meteorological Administration showing considerable year-to-year variation driven by monsoon patterns and urban heat-island effects. The 2025 summer season will provide the most recent comparable baseline; traders should examine whether that year's August 11 temperature fell within the range currently priced at 0%, which would explain the market's confidence.

Monitoring China's meteorological forecasts from late July onwards becomes critical, as the East Asian summer monsoon's strength directly influences Beijing's August heat. The China Meteorological Administration publishes monthly outlooks; traders should cross-reference these against Weather Underground's historical accuracy for the Beijing airport station, as discrepancies between Chinese official measurements and the resolution source have occasionally created settlement disputes on weather markets.

Methodology

This page compares Highest temperature in Beijing on August 11? 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

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). On-chain settlement clears in minutes — the fastest payout path of the four.

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.

Is Betfair a Polymarket alternative?

Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.

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. Robinhood Prediction Markets 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.