Highest temperature in Wuhan on July 22?

Platform comparison

Market context

Wuhan Tianhe International Airport’s highest temperature on 22 July is the settlement variable here, so the main question is whether the day finishes in the upper 20s or pushes into 30°C territory. At 09:30 UTC, Polymarket’s book has 29°C as the frontrunner at 51%, with 30°C next at 34%, which implies the market is still clustering around a warm but not extreme afternoon peak.[1]

That pricing is broadly consistent with a midsummer inland China setup where the day’s maximum usually arrives after local midday rather than early morning, leaving meaningful time for additional warming. Meteoblue’s live outlook for Wuhan Tianhe International Airport shows a 27°C maximum for the day, below the market’s leading 29°C outcome, which suggests traders are weighting either a warmer realised peak than the model currently shows or a late-day revision in conditions.[2] On Kalshi, the same event would be expressed in implied probability, while on Betfair or Smarkets it would more likely be framed in decimal odds, with the final economics affected by commission rather than a simple headline probability; access also differs because KYC and jurisdictional reach vary across those venues.

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Methodology

We read Highest temperature in Wuhan on July 22? 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.

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.

Which platform is accessible globally?

Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Kalshi 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.