Highest temperature in Wuhan on August 17?

Platform comparison

Market context

Wuhan will experience peak summer heat on 17 August 2026, with the highest temperature recorded at Tianhe International Airport Station determining the settlement outcome. The market divides outcomes into temperature ranges measured in degrees Celsius, with the 0% crowd probability suggesting traders currently expect no extreme heat spike on that specific date.

Historical August temperatures in Wuhan show consistent patterns: the city regularly records highs between 32–36°C during mid-August, with occasional peaks above 37°C during particularly intense heat waves. The 2013 heat wave saw temperatures reach 40°C in early August, whilst more recent summers have stabilised around 34–35°C averages. This baseline matters because the market's resolution hinges on Weather Underground's Daily Observations table rather than summary figures—a distinction that occasionally produces discrepancies of 1–2°C depending on measurement timing and station calibration. Traders comparing this market across platforms will note Kalshi's decimal odds format differs from Polymarket's implied probability display, affecting how the current 0% reads contextually; on Betfair or Smarkets, the same market might show fractional odds that appear more granular for small-probability events.

Monitoring China Meteorological Administration forecasts from July 2026 onwards will be essential, particularly any alerts for August heat waves or tropical cyclone activity that could suppress temperatures. Wuhan's monsoon season transitions during mid-August, introducing variability that historical averages alone cannot predict. The settlement window closes at 12:00 UTC on 17 August, meaning traders must account for timezone conversion when tracking real-time airport station data.

Methodology

We read Highest temperature in Wuhan on August 17? 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

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

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.

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.

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.