Highest temperature in Beijing on August 11?

Platform comparison

Market context

Beijing's highest temperature on 11 August 2026 will be recorded at Capital International Airport Station and resolved against Weather Underground's Daily Observations table rather than the Day High & Low summary—a distinction that matters when platforms diverge on data hierarchy. The current 0% implied probability reflects either extreme confidence in a specific temperature band or sparse trading volume; across Polymarket, Kalshi, Betfair and Smarkets, such thin markets often show wide spreads between decimal odds and stated probabilities, particularly on niche weather outcomes where historical data is abundant but trader participation remains low.

August temperatures in Beijing typically range between 25–34°C, with peak heat occurring in mid-month. Historical records from the past decade show 11 August highs clustering around 30–32°C, though extremes have reached 35°C during particularly intense summer patterns. The 0% probability suggests either the market has resolved to a narrow band already or traders are waiting for seasonal forecasts to firm up. Weather Underground's Daily Observations feed updates continuously through the settlement window (ending 12:00 UTC on 11 August), meaning real-time monitoring of the airport station's hourly readings will be critical for position management.

Traders should track China Meteorological Administration forecasts released in early August, which typically provide 10-day outlooks by the first week of the month. Atmospheric patterns affecting North China—including monsoon moisture and high-pressure systems—will determine whether 11 August falls into a cooler or hotter band. Kalshi's KYC requirements and Polymarket's offshore structure create different accessibility profiles for this market, whilst Betfair and Smarkets' European licensing may impose distinct settlement verification protocols around the Weather Underground data source.

Methodology

We read Highest temperature in Beijing 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

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.

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.

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.