Highest temperature in Chengdu on August 11?

Platform comparison

Market context

Chengdu's August weather will determine whether the highest temperature recorded at Shuangliu International Airport on 11 August 2026 falls within a specific range. The market uses Weather Underground's Daily Observations table as the binding resolution source, not the summary figures displayed elsewhere on the platform—a distinction that matters when automated systems report slightly different peak readings. Settlement occurs at midday UTC on the resolution date, giving traders a defined window before final confirmation.

August represents peak summer heat in Sichuan Province, with historical daily maxima typically ranging between 28°C and 35°C at the airport station. The 0% implied probability across major platforms suggests either extreme confidence in a particular temperature band or sparse liquidity fragmenting the market. Polymarket's fee structure and decimal odds presentation may attract different trader cohorts than Kalshi's binary format or Betfair's traditional fractional odds, potentially explaining divergence in how this specific weather outcome is priced across books. Smarkets' commission model similarly influences whether marginal temperature ranges attract sufficient backing.

Traders should monitor China Meteorological Administration forecasts released in early August, which typically provide 10-day outlooks with reasonable accuracy for regional temperature patterns. Shuangliu's urban heat island effect and proximity to Chengdu's expanding industrial zones can elevate readings relative to surrounding rural stations. Any unusual atmospheric patterns—monsoon shifts, high-altitude pressure systems—would warrant checking multiple weather services before the settlement window closes, given the resolution source's specificity to a single airport station rather than city-wide averages.

Methodology

We read Highest temperature in Chengdu on August 11? from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live mid is the canonical probability; the side-by-side columns benchmark fees, KYC, settlement currency and deposit rails so you can choose the venue that fits your jurisdiction and trade size.

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

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. 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.

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.