Highest temperature in Beijing on July 4?

Platform comparison

Market context

On 4 July 2026, the Beijing Capital International Airport Station will record its peak temperature, a real-world event that determines the outcome of a prediction market where the crowd currently assigns zero probability to the “YES” outcome. Historical climatology shows July averages near 31–32°C, with weak synoptic forcing occasionally pushing readings 2–4°C higher [1]. Past extremes include Beijing’s all-time high of 41.9°C on 24 July 1999 [2] and a 42.1°C peak on 5 July 2010 [4]. Despite these records, the current Polymarket frontrunner is 35°C at 25%, while Lines.com prices the same outcome at 37.5% [1][3], revealing a meaningful divergence between platforms. This discrepancy suggests thin volume and differing trader interpretations rather than consensus on the likely temperature range.

Traders should monitor upcoming weather model updates and any official heatwave advisories from Chinese meteorological authorities, as these can signal sudden shifts in peak temperature expectations [2]. Recent reports indicate temperatures in the capital are expected to drop to around 34°C before rising again later next week, hinting at volatile short-term trends [2]. Analyst consensus remains cautious, with most models projecting highs between 30–35°C, though extreme outliers remain possible given Beijing’s summer volatility [7]. The settlement window closes on 4 July 2026 at 12:00 UTC, so real-time Wunderground data will be the definitive resolution source [1]. With odds updating continuously, the market reflects the latest collective view, making it essential to track both platform-specific pricing and external weather forecasts for accurate positioning.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Beijing on July 4? 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 vs Polymarket, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 vs Polymarket. 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.

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 vs Polymarket 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.