Highest temperature in Shanghai on July 13?

Platform comparison

Market context

Shanghai faces its peak summer heat today as traders assess the highest temperature recorded at Pudong International Airport on 13 July 2026. Current forecasts indicate daily highs between 32°C and 34°C, with meteorological models converging on 33°C as the most likely peak [3][5]. The crowd-implied probability of 0% YES suggests the market expects the temperature to fall outside the specific range offered, likely due to the consensus leaning toward moderate summer highs rather than extreme heat spikes.

Historical July data for Shanghai typically sees temperatures exceeding 35°C, yet the 2026 forecast remains slightly below this traditional threshold, hovering around 30–32°C for the mid-month period [4][9]. This divergence from the usual intense heat explains the low probability assigned to higher ranges; traders on Polymarket utilise implied probability directly, whereas platforms like Kalshi or Betfair often display decimal odds, creating a friction point for those comparing book efficiency. Fee structures also vary significantly, with Polymarket’s zero-KYC model contrasting sharply with Kalshi’s strict identity verification, influencing liquidity depth on niche weather events like this.

Traders should monitor real-time updates from Wunderground, the designated resolution source, as cloud cover and wind gusts could suppress the peak temperature below 35°C [3][5]. Recent hourly forecasts predict a maximum of 32°C at 14:00 local time, reinforcing the view that extreme heat is unlikely today [5]. While Smarkets offers lower fees for verified users, the lack of KYC on Polymarket allows faster entry for this specific weather contract, though settlement relies entirely on the single data point from the airport station rather than broader city averages.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Highest temperature in Shanghai on July 13? 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 Robinhood Prediction Markets, which mirrors the Polymarket order book at 0% fees.

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

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.

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.

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. Robinhood Prediction Markets 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. Robinhood Prediction Markets 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.