Highest temperature in Chengdu on July 23?

Platform comparison

Market context

Chengdu’s highest temperature today will be set by the reading at Chengdu Shuangliu International Airport Station, and the market resolves on the day’s maximum Celsius value rather than an average. July in Chengdu is normally hot and humid, with typical daytime highs around 30–35°C, so a settlement in that band would be consistent with the city’s usual summer profile.[1][2]

The current **0% YES** crowd view implies traders think the final maximum will miss the market’s YES range entirely, but that is a very strong stance given Chengdu’s July climate. In practice, a few degrees’ difference can matter more here than on many weather markets, because the contract is tied to a single station and a single daily peak, so short-lived afternoon warmth or cloud/rain timing can move the result across range boundaries.[1][2]

For platform comparison, Polymarket-style markets usually show **implied probability** directly, while Kalshi and Betfair-style books are easier to read as **prices or odds** that must be converted into probability, and fees can bite differently depending on venue and market access. KYC scope also matters: regulated exchange-style platforms typically require stronger identity checks and may restrict jurisdictions, whereas cross-platform liquidity can diverge sharply on weather events where local forecasts, airport observations, and fee drag all shape whether traders lean into a near-term temperature surprise.

Sources: 1 · 2

Methodology

We read Highest temperature in Chengdu on July 23? 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.

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.