Highest temperature in Guangzhou on July 27?

Platform comparison

Market context

The underlying event is the highest temperature recorded at Guangzhou Baiyun International Airport on 27 July, with settlement based on the Wunderground daily history page for that station. Early forecast pages point to a very hot day in Guangzhou, with a peak around 37°C and little or no rain in at least part of the outlook, which is consistent with a market expecting the upper temperature bands to be tested rather than a cool outcome.[1][4]

The current 0% YES probability is not a reliable guide to the weather itself; it more likely reflects a stale or thinly traded market than an expectation that Guangzhou will be cold. Similar summer setups in the city tend to cluster in the mid-to-high 30s Celsius, and recent forecasts put the day’s range at roughly 33°C to 37°C, which would leave the market dependent on whether the airport station matches the hottest city-wide reading or comes in a notch lower.[1][3]

For traders, the main catalyst is the day-of forecast and any late shift in rainfall or cloud cover rather than a political-style schedule of events. The market is leaning on the developing weather pattern: if showers or thicker cloud build during the daytime, the maximum could stay below the top forecast band; if sunshine holds, Guangzhou remains positioned for another high-30s reading.[1][4] The most relevant source for resolution remains the Wunderground station history page, so any update there on the final observed high will matter more than earlier model runs.[1]

Sources: 1 · 2 · 3 · 4

Methodology

This page tracks Highest temperature in Guangzhou on July 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. For users geo-blocked from Polymarket directly, brokers like Election Predictions UK provide a 0%-fee route into the same order book.

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

How accurate are political prediction markets?

Historically more accurate than polls. Polymarket's Brier score on US 2024 elections was ~0.11 — better than 538 (~0.14) and every mainstream poll. Markets aggregate information with real skin in the game.

Can prediction markets influence election outcomes?

Markets reflect expectations rather than create them. Studies show public-facing markets can anchor expectations, but don't influence the underlying outcome. Political markets are information, not advocacy.

Which platform has the deepest political liquidity?

Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Election Predictions UK route into the same order book at 0% fees.

Are political prediction markets legal in my country?

It varies. They sit in legal gray areas in most jurisdictions. Polymarket is geo-blocked from US/UK/EU; some broker frontends have a different geo footprint. Trade only with capital you can afford to lose, and only if you understand the legal status in your jurisdiction.

Why do Polymarket and Kalshi differ on elections?

Kalshi must follow CFTC compliance — strict definitions, clear resolution sources, US citizens only with KYC. Polymarket operates globally without CFTC oversight — deeper liquidity, but also higher regulatory risk.