Highest temperature in Guangzhou on July 1?

Platform comparison

Market context

The real-world event at hand is the peak daytime temperature recorded on 1 July 2026 at Guangzhou Baiyun International Airport, a metric that directly determines the settlement of a specific weather prediction market. For a power-user evaluating this tooling programmatically, the market’s current 0% probability for the “YES” outcome (implying a temperature below a certain threshold, likely 35°C) must be weighed against historical climatology. Guangzhou’s July averages sit near 32°C, yet the city is prone to spikes reaching 34–35°C, with the all-time record for this specific date hitting 39.1°C on 1 July 2004[4]. This historical outlier suggests that while the frontrunner in the broader market is 32°C at 79%, the tail risk of extreme heat remains non-trivial, framing the current low probability as a reflection of typical conditions rather than an absolute guarantee against anomalies[1].

Traders approaching this market should monitor immediate meteorological dependencies, specifically the development of convective cloud systems and the position of the subtropical ridge, which often dictates peak temperatures in southern China. A critical catalyst to watch is the recent confirmation that China experienced its hottest July on record in 2023, with the highest average temperature since comprehensive data collection began in 1961[3]. This long-term warming trend implies that baseline temperatures may be shifting higher than historical averages, potentially increasing the likelihood of days exceeding 35°C. Programmatically, one would integrate real-time Wunderground data feeds to track hourly temperature deviations against the 33°C average high for July[6], adjusting conditional orders as the ridge strengthens or weakens. The settlement window ending 12:00 UTC on 1 July 2026 requires precise timing for data ingestion, ensuring the highest recorded value for the day is captured accurately before the market resolves.

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 Polymarket Review UK, 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

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.

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 Review 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.