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, a date historically prone to thunderstorms and heavy rain rather than extreme clear-sky heat. Current crowd-implied probability sits at 0% for the YES contract, suggesting the market views a specific high-temperature threshold as virtually impossible, yet this flat pricing often masks structural uncertainty rather than genuine certainty. Historical July averages in Guangzhou cluster near 32–33°C, with daily highs rarely falling below 85°F or exceeding 96°F, providing a baseline that contradicts the zero-probability stance unless the market is betting on a precise, narrow band that misses the typical range.

Traders should monitor real-time steering patterns, soil moisture levels from prior rainfall, and the timing of any thunderstorm activity, as these variables directly suppress peak temperatures. Recent reports confirm Guangzhou experienced its longest summer since 1961, with July averaging 23.3°C, the highest since 1961, indicating a warmer baseline that could shift expectations if cloud cover breaks unexpectedly. The consensus leans heavily toward the 32–34°C range, but value may sit contrarian in the 35°C+ bucket if the heatwave persists without significant rain, as structural probability math often undervalues hotter outcomes in tight distributions. The implied 0% probability is not a confident bet; it reflects a one-in-four structural chance that the peak lands exactly on a specific band, leaving ten other outcome buckets to compete for the remaining probability.

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 Who Will Win 2026, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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.

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.