Highest temperature in Chengdu on July 25?

Platform comparison

Market context

Chengdu will record a maximum temperature on 25 July 2026, measured at Shuangliu International Airport Station. The settlement hinges on the single highest reading captured across all hours that day, converted to Celsius and mapped to one of several temperature bands. The 0% crowd probability suggests either extreme confidence in a specific range or sparse liquidity across the full option set—a common pattern on niche weather markets where traders cluster positions rather than distribute evenly.

Chengdu's July climate is reliably hot. Historical data from Wunderground shows the city regularly reaches 33–36°C in late July, with occasional peaks above 37°C during heat waves. The 2023 summer saw sustained temperatures above 35°C for weeks; 2024 followed a similar pattern. This historical consistency means the market's current probability distribution likely reflects strong consensus around a narrow band rather than genuine uncertainty about whether extreme heat will occur. Traders on Kalshi and Betfair, which offer decimal odds alongside implied probabilities, may display sharper differentiation between adjacent temperature ranges than Polymarket's binary-style framing allows, potentially revealing where the true disagreement lies.

Monitoring China's meteorological forecasts from the China Meteorological Administration will be essential in the weeks before settlement. Seasonal patterns favour high temperatures, but anomalous weather systems—particularly monsoon activity or upper-level troughs—can suppress maxima. The settlement window closes at 12:00 UTC on 25 July, giving traders access to extended forecasts only until mid-July. Smarkets and Betfair typically update odds more frequently on weather markets as forecast confidence improves, whereas Polymarket's order-book depth may lag on lower-volume outcomes.

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

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.

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. Polymarket Alternative 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. Polymarket Alternative 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.