Highest temperature in Shanghai on July 15?

Platform comparison

Market context

Shanghai is currently experiencing hot and humid conditions with a high of 36°C today, yet the market assigns a 0% probability to any temperature range being hit, creating a stark divergence between live weather data and crowd sentiment. This zero-implied probability is anomalous given that July in Shanghai typically sees average highs of 32°C, with forecasts for July 2026 projecting daily peaks between 32°C and 38°C (89°F to 100°F) at the Pudong station [1][10]. Historical patterns and current seasonal averages suggest that temperatures reaching 37°C or 38°C are statistically probable, meaning the current pricing likely reflects a technical error or a liquidity gap rather than a genuine belief that the day will remain cool.

Traders should monitor the hourly METAR updates from the Shanghai Pudong International Airport (ZSPD) station, as the market resolves strictly on the highest temperature recorded at this specific site via Wunderground [2][6]. The immediate catalyst is the afternoon weather window, where forecasts indicate scattered showers developing after 2pm alongside main sunshine, which could suppress the peak temperature if rain arrives early [4][7]. With the settlement window closing at 12:00 UTC on 15 July 2026, the market will resolve based on the final daily maximum, and any significant deviation from the expected 35°C–38°C range will be the primary driver for price correction as the day progresses [1][11].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Prediction Today. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Prediction Today trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.