Highest temperature in Chengdu on July 25?

Platform comparison

Market context

Chengdu will experience peak summer heat on 25 July 2026, with the settlement hinging on the single highest temperature recorded at Shuangliu International Airport Station during that calendar day. The market currently shows zero probability assigned to any outcome, suggesting either extreme uncertainty or insufficient liquidity across competing platforms. Kalshi's binary structure typically forces traders into discrete YES/NO positions, whilst Polymarket's categorical framework here allows granular temperature bands—a structural difference that affects how conviction translates into odds. Betfair and Smarkets offer decimal odds formats that some traders find more intuitive than implied probabilities, though all four platforms require KYC verification for substantial stakes.

Chengdu's July temperatures have historically ranged between 28–35°C, with occasional peaks above 36°C during heat waves. The 2022 summer saw extreme temperatures across central China, with Chengdu recording 40.2°C in August—a reference point for assessing tail-risk scenarios. The 0% crowd probability likely reflects the market's early stage rather than genuine forecasting consensus; comparable weather markets on established books typically show 40–60% probability mass distributed across the most likely bands.

Traders should monitor China Meteorological Administration forecasts released in early July 2026, as well as broader atmospheric patterns such as the East Asian summer monsoon intensity and any high-pressure systems tracking into Sichuan Province. The settlement window closes at 12:00 UTC on 25 July, meaning local afternoon temperatures—typically the daily peak—will determine resolution. Wunderground's historical data access is straightforward, though cross-checking against CMA official records remains prudent for dispute scenarios.

Methodology

We read Highest temperature in Chengdu on July 25? 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.

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.

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.