Highest temperature in Chengdu on August 1?

Platform comparison

Market context

Chengdu’s hottest temperature on 1 August will be judged against the highest reading at Chengdu Shuangliu International Airport Station, so the market is effectively a one-day late-summer heat call for that specific station rather than for the city as a whole. Long-run climate data put early August near the seasonal peak: average August highs are around 30–31°C, with 1 August often among the warmest days of the month, and historical extremes in Chengdu have reached about 39–41°C in severe heat events.[1][4][16]

That context makes a 0% YES crowd price notable, because the historical distribution implies that a reading in the lowest listed range would be unusual for August, while a mid-30s Celsius outcome would still be compatible with prior hot spells.[2][5][17] On Polymarket, the quoted number is typically an implied probability, whereas Kalshi and many sportsbook-style books present pricing in dollars or decimal odds, so the same view may look different across venues even before fees. Betfair and Smarkets also matter here because exchange commissions and liquidity can be the main cost, while access and KYC are not uniform across platforms.

For catalysts, traders should watch the day’s actual forecast trend into the morning of 1 August, any rain or cloud cover over Chengdu, and whether a late-afternoon convective burst caps the airport’s maximum temperature before the settlement window closes at 12:00 UTC. Because the resolution source is the airport station’s daily history page, the final print depends on that specific station rather than nearby urban readings, which can diverge in a humid, storm-prone summer climate.[10][12][18]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Highest temperature in Chengdu on August 1? 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

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.

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.

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.