Highest temperature in Shanghai on July 24?

Platform comparison

Market context

Shanghai’s airport reading on 24 July will be driven by a classic midsummer mix of heat, humidity and showers, with forecast services pointing to highs in the low-to-mid 30s Celsius and a meaningful chance of rain around the day. That matters because the market resolves off the *highest* temperature at Shanghai Pudong International Airport Station on Wunderground, so even a brief warm spike before cloud or precipitation arrives can decide the band. Current crowd pricing at 0% YES looks disconnected from the meteorology: broad July climatology for Shanghai is firmly hot, with average highs around 32°C and heavy rainfall common, while a live 10-day forecast has already shown peak temperatures near 35°C/96°F[1][2][3][5].

For comparison, this is the kind of weather market where platform mechanics matter more than the headline quote. On Polymarket, the crowd-implied probability is usually the quickest read, but it can be thinly traded and may lag local weather updates; Kalshi typically presents contracts with exchange-style pricing and clearer fee treatment, while Betfair and Smarkets often quote decimal odds and take commission from winnings rather than embedding the cost in the spread. For a one-day temperature settlement, that means a low displayed probability on one venue does not necessarily mean the same pricing on another if the book is wider, the contract set is different, or access is constrained by KYC and regional availability.

Traders should watch the final airport forecast, radar timing, and whether showers or thunderstorms arrive before the settlement cut-off, because cloud cover and rainfall can cap the day’s maximum even if the morning starts hot. Wind direction and any late-afternoon clearing also matter, since a short hot window can push the reading into a higher band at the airport station. The key dependency is not the daily mean, but the single highest observed value published for that station on Wunderground before the window closes.[1][3][5]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Highest temperature in Shanghai on July 24? 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 Polymarket Alternative, which mirrors the Polymarket order book at 0% fees.

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

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. 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.