Highest temperature in Beijing on July 7?

Platform comparison

Market context

On 7 July 2026, the Beijing Capital International Airport Station will record its peak temperature for the day, with the market currently pricing a 32°C hit at just 29.5% probability, while the broader “YES” outcome for any temperature above a specific threshold sits at 0% [1]. This stark divergence reflects how Polymarket’s conditional tokens, settled in USDC on the Polygon network, are capturing extreme uncertainty rather than a clear directional bias, forcing traders to weigh on-chain liquidity against real-world volatility.

Historically, Beijing’s July highs average around 31°C (88°F), rarely dipping below 26°C or exceeding 36°C, though extreme heatwaves have pushed temperatures to 40°C in 2023 and 42.1°C on 5 July 2010 [2][3][8]. The 0% current probability for the broader outcome suggests the market is either mispricing the likelihood of a moderate spike or waiting for a definitive catalyst, as past records show that even in “cooler” years, daily peaks frequently breach 30°C.

Traders should monitor China’s National Meteorological Centre forecasts for the Beijing region, particularly any announcements of incoming heatwaves or monsoon activity, as recent data shows China recorded its hottest July month in history in 2024, with average temperatures reaching 23.21°C [4][7]. The settlement relies on Wunderground’s daily high for all times on 7 July, so any sudden shifts in weather models or official advisories—such as those urging outdoor limits during record heat—could rapidly reshape on-chain pricing [6].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Kalshi UK, which mirrors the Polymarket order book directly.

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 Kalshi UK. 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'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.

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.

Do I need to KYC for this market?

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