Highest temperature in Guangzhou on June 27?

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Market context

The real-world event hinges on whether a record-breaking heatwave will strike Guangzhou Baiyun International Airport on 27 June 2026, pushing temperatures beyond the 36.6°C historical ceiling. Current crowd-implied probability sits at 0% YES, suggesting traders view such an extreme as statistically implausible given the region’s typical June climate. Historically, June in Guangzhou is one of the wettest months, averaging 280mm of rainfall with frequent thunderstorms and heavy downpours that suppress peak temperatures [1]. While the city has experienced continuous sunny days recently, with May 2026 hitting 36.3°C—the hottest May in history [5], June’s subtropical high-pressure influence usually brings cooling rain rather than sustained scorching heat [1]. The 36.6°C record remains a formidable barrier, rarely breached even during the hottest summers, framing the current 0% probability as a rational assessment of seasonal norms rather than market pessimism.

Traders should monitor imminent weather forecasts for typhoon activity or sudden shifts in the subtropical high-pressure system, which could trigger the necessary clear-sky conditions for extreme heat. Recent news from People’s Daily highlights Guangzhou’s recent streak of sunny days and record May temperatures, indicating a potential precursor to a hotter June if rainfall patterns fail to materialise [5]. Key catalysts include scheduled meteorological announcements from Wunderground, the official resolution source, and any declarations regarding typhoon warnings that typically arrive in June [1]. The market leans heavily on the absence of a typhoon; if one forms, the 0% YES probability will likely hold, whereas a prolonged dry spell could shift sentiment. Watch for updates from the China Meteorological Administration, as their forecasts often dictate short-term temperature volatility in the Pearl River Delta region.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page tracks Highest temperature in Guangzhou on June 27? across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. Election Predictions UK routes every trade through to Polymarket — at 0% fees.

Resolution & payout

For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.

FAQ

Where can I trade this market with the lowest fees?

On Election Predictions UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Election Predictions UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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.

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.

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.