Highest temperature in Wuhan on August 10?

Platform comparison

Market context

Wuhan’s temperature on 10 August will be set by the highest reading logged at Wuhan Tianhe International Airport Station on Weather Underground, not the site’s summary high. That matters because the market resolves to a Celsius band, so the relevant question is whether the station gets above, below, or into the middle of the usual August daytime range rather than where the headline forecast lands. Weather Underground’s early readings on 10 August already showed 80–84°F, roughly 27–29°C, with the 11:00 entry at 84°F, or about 29°C, which sits close to the most actively traded bands on Polymarket’s version of the event.[1][11]

Historically, August is Wuhan’s hottest month, with average highs around 32.5–33.6°C and record highs reaching 40–41°C in some climate archives.[3][6][8] That seasonal baseline explains why a zero-per-cent YES price on a higher band can be misleading if traders are looking at a broader city forecast rather than the station-specific data source. On Polymarket, prices are shown as implied probabilities, while Kalshi and Smarkets quote decimal-style prices and Betfair uses exchange odds, so the same temperature band can appear different across books even when the underlying expectation is similar; fees and access also vary, with Betfair and Smarkets generally operating as exchanges and Polymarket using wallet-based crypto rails rather than the standard KYC funnel seen on regulated venues.[11]

The main catalysts are the rest of the day’s station observations and whether cloud, rain, or a post-morning lull caps the maximum before the daily file rolls over. Current public forecasts for Wuhan point to patchy rain, high cloud cover, and temperatures around 26–30°C, which would favour a lower final high than Wuhan’s climatology.[9][19][20] Traders should also watch for any late-morning or early-afternoon spike at the airport station, because the market’s settlement source is the Daily Observations table and any later correction there, before the next day’s first datapoint, is what matters for resolution.[1][11]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We read Highest temperature in Wuhan on August 10? 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

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.

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.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Kalshi 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.