Highest temperature in Beijing on July 7?

Platform comparison

Market context

Beijing faces its peak summer heat on 7 July 2026, with the market betting on whether the Beijing Capital International Airport Station will record a temperature in a specific range. The crowd-implied probability of 0% for the YES outcome suggests traders view the target range as virtually impossible given historical July extremes.

Historical data frames this near-zero probability as rational: Beijing’s all-time record high is 41.9°C (107°F), set on 24 July 1999, while the hottest day in the city’s recorded history reached 42.1°C on 5 July 2010 [1][2]. July daily highs typically average around 31°C (88°F), rarely exceeding 36°C (96°F) [3]. With recent years showing China’s hottest July on record in 2024—averaging 23.21°C nationally and pushing Beijing to 40°C in 2023 [4][5], the 0% line implies the market’s target range likely exceeds even these extreme benchmarks, aligning with sportsbook odds that dismiss such outliers.

Traders should monitor real-time Wunderground updates for the ZBAA station, the official resolution source, and watch for any sudden heatwave announcements from Chinese meteorological authorities [1]. Recent news confirms China recorded its hottest month in recent history in July 2024, with sustained high temperatures across the north [4][6]. No new policy announcements or schedule changes are pending, but humidity spikes could push temperatures higher than dry forecasts suggest, a dependency worth tracking as the settlement window closes at 12:00 UTC on 7 July.

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 vs Polymarket, which mirrors the Polymarket order book directly.

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

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.

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.