Lowest temperature in Hong Kong on July 31?

Platform comparison

Market context

Hong Kong’s **lowest temperature on 31 July** will be set by the Hong Kong Observatory’s final “Absolute Daily Min (deg. C)” for that date, so the market is really about the city’s overnight floor rather than the daytime heat. July in Hong Kong is normally very warm and humid: the Observatory’s 1991–2020 normals put the late-July mean minimum around **26.9°C to 27.0°C**, which is far above the range that would correspond to a very low reading in this market.[6][16]

That is why the current **3% YES** looks like a long-shot verdict from the crowd: in historical framing, a true “low” outcome needs an unusually cool night or a weather interruption strong enough to drag the minimum well below seasonal norms. Hong Kong’s July pattern is usually dominated by the subtropical ridge, and the Observatory described July 2023 as exceptionally hot, even noting that rain on 31 July briefly interrupted the heat before temperatures rebounded.[8][15] In prediction-market terms, this behaves less like a public popularity contest and more like a judge’s scorecard: the final number is fixed by one official source, and the market only cares whether that score lands in the chosen temperature band.

Traders should watch the Observatory’s late-day update cycle and whether the “Daily Extract” for 31 July is finalised on schedule, because the market cannot settle until that publication appears.[16] Any late thunderstorm, tropical disturbance, or overnight cloud and rain can matter disproportionately because the resolution metric is the **day’s minimum**, not the daytime maximum.[16] Hong Kong’s climate pages and monthly summaries are the relevant dependency here, so the key catalyst is not a press conference but whether the Observatory’s final daily extract confirms an anomalously cool overnight reading.[2][13][16]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Entertainment-specific comparison page for Lowest temperature in Hong Kong on July 31?. Polymarket's live quote (Polygon order book) shows the award probability. For awards markets, Polymarket usually has the deepest liquidity; Betfair runs comparable markets for Oscars/Emmys; Manifold for Eurovision.

Resolution & payout

Entertainment markets settle on official award ceremony or show end. Polymarket uses UMA Optimistic Oracle with a source URL to the official award website. Two-hour dispute window, then smart-contract payout in USDC.

FAQ

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Best Picture, with ~$2.8M volume on Polymarket. "Anora" started as an underdog at ~8% and closed at ~62% before the ceremony — the biggest single Oscar market swing since 2019.

Who can trade Eurovision markets?

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How are reality-TV outcomes verified?

UMA Oracle uses the official show website or producer statement as the resolution source. Very narrowly defined markets (e.g. "Will X be voted off the island?") rely on the official show notes.

Are there politics-entertainment crossover markets?

Yes — e.g. "Will X be parodied on SNL?", "Who will host the next Oscars?". These have thinner liquidity but offer alpha for traders who read pop-culture and political worlds together.

Is entertainment trading worth the effort?

Niche, but lucrative for experts. Award markets have fewer informed traders than political markets; combining industry expertise (film, music) with active research often surfaces mispricings. Volume cap: large bets move the market.