Highest temperature in Guangzhou on July 6?

Platform comparison

Market context

The underlying event is the daily peak temperature recorded at Guangzhou Baiyun International Airport on 6 July 2026, with the market currently pricing a 32°C outcome at 0% YES. This near-zero implied probability suggests the consensus expects the high to fall below the 32°C threshold, likely clustering around 30–31°C, despite July being Guangzhou’s hottest month with an average of 28.3°C and daily highs frequently reaching 31–33°C historically[4]. Recent Polymarket data for 4 July shows a 34% probability for 32°C, with UK Met Office forecasts pointing to a 31°C maximum, indicating that while extreme heat is rising in East Asia—extreme hot days (33°C+) have more than doubled since the 1960s[3]—the current market may be undervaluing the chance of a spike to 32°C or higher, especially if cloud cover breaks or humidity drops.

Traders should monitor real-time weather updates from Wunderground for the Baiyun station, as the resolution hinges on the highest temperature recorded at any time on 6 July, not just the official daily average[1]. A key catalyst is the potential for a heatwave intensification, given China experienced its hottest July on record this year with an average of 23.2°C since 1961, and Guangzhou saw its longest summer since 1961 with an average of 23.3°C[6][7]. If the UK Met Office or China Meteorological Administration issues a heat alert for the region, the 32°C line could become value-rich, offering a contrarian angle against the 0% consensus. The settlement window ends at 12:00 UTC on 6 July, so any late-morning temperature surge could resolve the market unexpectedly.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Guangzhou on July 6? 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 Who Will Win 2026, which mirrors the Polymarket order book at 0% fees.

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

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'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.

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.