Highest temperature in Shanghai on July 7?

Platform comparison

Market context

On 7 July 2026, the Shanghai Pudong International Airport Station will record its peak temperature for the day, a real-world metric that determines the settlement of this prediction contract. Currently, Polymarket prices the "YES" outcome at 0%, implying the crowd believes the temperature will fall outside the specific range being traded, despite July historically being Shanghai’s hottest month.

Historical data frames this near-zero probability as potentially premature. In July 2025, Shanghai reached 38°C (100°F), and average highs typically peak between 31°C and 35°C, often exceeding 35°C during the daytime [2][7]. The warmest day in July usually occurs around 29 July at 32.5°C, yet early July can still see significant heat spikes, with 3 July recording 24.3°C as a coldest outlier in the first ten days [3]. Given that daily highs in July 2026 are forecast to range from 86°F to 100°F (30°C to 38°C), the current 0% pricing ignores the statistical likelihood of temperatures breaching the upper threshold of the traded range [6].

Traders should monitor the immediate weather schedule for sudden convective storms or heatwaves, as early July precipitation patterns can fluctuate rapidly [7]. A key dependency is the release of the official Wunderground daily record for ZSPD, which will settle the market at 12:00 UTC on 7 July 2026. While no specific announcement is pending, the on-chain mechanics on Polygon using USDC conditional tokens will execute automatically once the resolution source confirms the temperature [5]. The absence of a "plum rain" event in the forecast could allow temperatures to climb unchecked, making the 0% price a high-risk position for sellers who may face significant losses if the day exceeds 35°C.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Shanghai on July 7? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Kalshi UK, which mirrors the Polymarket order book at 0% fees.

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

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's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

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.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

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.