Highest temperature in Beijing on July 6?

Platform comparison

Market context

The real-world event at hand is the peak daytime temperature recorded on 6 July 2026 at the Beijing Capital International Airport Station, a metric that will determine the settlement of a weather prediction contract. While one platform currently shows a crowd-implied probability of 0% for the "YES" outcome, this figure diverges sharply from the collective view on Polymarket, where traders assign a 35% chance to 33°C and a 43% chance to 34°C[1]. This stark contrast in odds suggests a significant mispricing between the two markets, with the zero-probability line failing to account for Beijing’s historical thermal behaviour during early July.

Historical data frames this discrepancy clearly, as daily high temperatures in Beijing during July typically hover around 88°F (31°C), rarely dropping below 78°F (26°C) or exceeding 96°F (36°C)[3]. Recent years have seen even more extreme volatility, with the city reaching 40°C (104°F) in 2023 and China recording its hottest month since records began in July 2023[5][7]. The existence of such high-temperature precedents, including a national record of 52.2°C in a remote township in 2023, undermines the logic of a 0% probability for temperatures in the 33–34°C range[4].

Traders should monitor the Beijing Meteorological Bureau’s daily heatwave forecasts and the real-time data feed from Wunderground, which serves as the official resolution source for this contract. The southern suburb observatory recently recorded 40.1°C on 6 July in a comparable year, indicating that airport station readings will likely follow a similar upward trajectory if heatwave conditions persist[2]. Analysts note that China logged an average of 4.1 days exceeding 35°C in 2023, the highest number since 1961, suggesting that early July heat is a recurring and statistically probable catalyst rather than an anomaly[6]. Ignoring these dependencies in favour of a zero-probability line ignores the robust evidence of seasonal thermal patterns.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Beijing on July 6? 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

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

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.

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.