Highest temperature in Wuhan on August 11?

Platform comparison

Market context

Wuhan will experience peak summer heat on 11 August 2026, with the highest temperature recorded at Tianhe International Airport Station determining the settlement outcome. The market divides outcomes into discrete temperature bands in degrees Celsius, and resolution depends specifically on the Daily Observations table in Weather Underground rather than summary figures, a distinction that matters when automated systems and manual records diverge.

Historical August temperatures in Wuhan show consistent patterns: the city regularly records highs between 33–37°C during mid-August, with occasional peaks above 38°C during heat waves. The 0% crowd probability suggests traders are either absent from this market or pricing in an outcome threshold so extreme it falls outside plausible scenarios. On Kalshi, where decimal odds dominate the interface, this manifests as odds reflecting near-zero implied probability; Polymarket's percentage-based display makes the same signal more visually stark. Betfair and Smarkets typically show stronger liquidity on weather markets with broader geographic appeal, meaning this niche Wuhan-specific contract may face wider bid-ask spreads across all platforms.

Traders should monitor China Meteorological Administration forecasts released in late July and early August, which provide 10-day outlooks for major cities. El Niño or La Niña conditions, tracked by NOAA, influence East Asian summer patterns and could shift August temperatures materially. The settlement window closes at 12:00 UTC on 11 August, giving traders a narrow window to adjust positions once local forecasts crystallise. KYC requirements vary: Kalshi enforces strict US-based verification, whilst Polymarket and Smarkets accept broader international participation, affecting which trader cohorts can access this contract.

Methodology

We read Highest temperature in Wuhan on August 11? 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.

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.

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 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.