Highest temperature in Beijing on July 13?

Platform comparison

Market context

Beijing is set to face its peak summer heat on 13 July 2026, with the city historically recording highs near or above 40°C during this month. The current crowd-implied probability of 0% YES on Polymarket suggests traders are confident the temperature will fall outside the specific range offered, likely betting on a lower peak or a different bracket entirely. This contract settles on USDC via Polygon, using conditional tokens to lock in positions based on the Wunderground reading from Beijing Capital International Airport Station.

Historical data frames this near-zero probability as a reaction to recent volatility rather than a lack of heat potential. In 2023, Beijing’s July highs reached 40°C, while the all-time record of 41.9°C was set in July 1999, and some datasets even cite a 42.1°C peak in 2010[1][3][9]. However, the market’s pricing implies the specific range in question is either too high to be plausible or misaligned with current seasonal averages, which typically see July highs around 31–32°C despite occasional spikes[5].

Traders should monitor real-time forecasts from Chinese meteorological authorities and Wunderground updates as the settlement window closes at 12:00 UTC. Recent heatwaves in northern China, including a 41.8°C record in 2023, show how quickly conditions can shift, making daily model revisions critical[7]. Any official announcements on heat emergency protocols or sudden cloud cover changes could alter the final reading, so watching the hourly temperature logs on the designated Wunderground page is essential for accurate positioning.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Beijing on July 13? 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

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

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.

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.

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.