Highest temperature in Shanghai on July 28?

Platform comparison

Market context

Shanghai's maximum temperature on 28 July 2026 will be recorded at Pudong International Airport Station and settled against Wunderground historical data. July is Shanghai's hottest month, with mean daily highs around 32–33°C and extremes regularly exceeding 35°C. The 0% crowd probability suggests either technical friction in market discovery or genuine uncertainty about whether any single temperature bracket will attract sufficient liquidity to trade meaningfully.

Historical July records for Shanghai show the city regularly experiences heat waves, with temperatures reaching 37–40°C during peak summer episodes. The 2013 heat wave pushed readings to 40.8°C; more recently, July 2022 saw multiple days above 38°C. These precedents indicate that mid-to-high 30s brackets should command non-trivial probability mass. The sparse trading activity here reflects a common pattern across weather markets: Polymarket and Kalshi both list such contracts, but Kalshi's tighter KYC requirements and US-centric user base mean fewer international traders engage with Shanghai-specific outcomes. Betfair's decimal odds format and established weather-betting community sometimes generate deeper liquidity on comparable Asian markets, though Shanghai temperature ranges remain niche.

Traders should monitor China Meteorological Administration forecasts released in early July and any El Niño or monsoon pattern updates affecting East Asia. Wunderground's historical data feed occasionally experiences minor reporting delays, though Shanghai airport station data is typically reliable. The settlement window closes at 12:00 UTC on 28 July, creating a hard deadline for any late-market repricing based on morning forecasts.

Methodology

This page compares Highest temperature in Shanghai on July 28? 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 Kalshi 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

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.

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.