Highest temperature in Beijing on July 11?

Platform comparison

Market context

Beijing’s Capital International Airport is set to record its peak temperature for 11 July 2026, with the market currently pricing any outcome above 27°C at 0% YES. This implies the crowd expects a cool day, yet historical data for mid-July in Beijing shows daily highs typically cluster between 30°C and 36°C, with 32°C and 33°C being common[10]. In 2023, July highs reached 40°C, and recent records confirm July is Beijing’s hottest month, often exceeding 35°C during heatwaves[2][9]. The 0% probability on higher ranges appears misaligned with seasonal norms, suggesting the favourite is the 30°C bracket (25% implied) while the underdog—anything above 31°C—holds significant value for contrarian traders.

Traders should monitor the China Meteorological Administration’s daily heatwave bulletins and any regional forecasts issued ahead of 11 July, as these directly influence settlement via Wunderground’s official station data[8]. Recent reports note China experienced its hottest July on record in 2024, with temperatures repeatedly hitting 40°C from 11 July onward, indicating a persistent trend of extreme summer heat that could recur in 2026[8][9]. The key dependency is whether a heatwave develops in the North China Plain; if forecasts shift toward above-average highs, the 0% pricing on 31°C+ becomes a clear value spot. Watch for updates from Reuters or the China Daily on heatwave declarations, as these act as immediate catalysts for probability swings.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Beijing on July 11? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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 Who Will Win 2026. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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 Who Will Win 2026 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.