Highest temperature in Guangzhou on July 7?

Platform comparison

Market context

The underlying event is the peak temperature recorded at Guangzhou Baiyun International Airport on 7 July 2026, measured in degrees Celsius. Historical data shows July highs in Guangzhou typically hover around 33°C (91°F), rarely dipping below 29°C or exceeding 36°C, with the highest average occurring late in the month [2]. A recent market on 3 July 2026 resolved to a 34°C peak, confirming traders’ ability to price near-exact bands despite ten competing outcome buckets [1]. This context explains why the current 0% YES probability for a specific range is not an error but a reflection of the market treating any single band as a low-probability shot, akin to the one-in-four chance assigned to 34°C on 3 July [1].

Traders approaching this programmatically should monitor real-time Wunderground feeds for the station ZGGG, setting conditional orders to trigger when hourly highs breach 35°C, as this signals a shift toward the upper resolution bands [5]. The primary catalyst is the ongoing heatwave across southern China, which has pushed July’s average temperature to 23.2°C, the highest since 1961, increasing the likelihood of extreme daily peaks [3]. Recent reporting confirms China recorded its hottest month in recent history, with averages eclipsing 23.17°C from 2017, suggesting elevated thermal stress for the upcoming week [8]. A power-user would integrate these dependencies into a bot that adjusts position sizing based on the heatwave’s intensity, rather than relying on static probability models.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Guangzhou on July 7? 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 Polymarket Bot 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

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 Polymarket Bot UK. 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.

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 Polymarket Bot 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.