Highest temperature in Hong Kong on August 1?

Platform comparison

Market context

Hong Kong’s highest temperature on 1 August will be set by the Hong Kong Observatory’s **Absolute Daily Max** once the daily extract is published and finalised, so the market is ultimately a single-observation weather outcome rather than a monthly average. Hong Kong’s August climate is normally hot, with the Observatory’s 1991–2020 normals showing a mean maximum of **31.6°C** on 1 August, while recent Augusts have still produced mid-30s readings, including **34.4°C** at the Observatory on 10 August 2025 and a very hot August 2024 with a mean daily maximum of **32.3°C**.[2][10][15]

A **0% YES** crowd price implies the market is treating a match to the relevant temperature band as extremely unlikely, but historical context argues against reading that as a pure impossible-event signal. Hong Kong’s late-summer heat frequently reaches or exceeds the low-30s, and the city has also seen record-breaking August warmth in recent years, including 2023’s hottest August on record by mean temperature.[6][13] For traders, the key catalyst is not a forecast model but the HKO publication schedule: the market cannot resolve until the Observatory posts the relevant daily extract for 1 August, and the final print is the sole settlement reference.[16]

On access and regulation, the practical point is that a market like this sits in a grey zone for users depending on domicile: Germany’s **GlüStV** framework can make participation legally sensitive for residents of jurisdictions that treat such wagering as gambling, while the **US CFTC** has broad reach over derivatives-like event contracts and has previously scrutinised event markets with US nexus. “No-KYC up to $1,500” means a user may be able to trade or withdraw within that limit without identity checks, but only until platform risk controls or jurisdictional restrictions require verification, and it does not remove country-based access blocks or legal constraints for this specific weather market.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This overview of Highest temperature in Hong Kong on August 1? reviews the four comparable platforms from a regulatory perspective: which is accessible in your jurisdiction, where KYC kicks in, how the platform is classified by your country of residence. Live probability is the Polymarket mid; comparison columns show regulatory status, KYC thresholds and settlement options for each platform.

Resolution & payout

On Polymarket, resolution runs on-chain via UMA Optimistic Oracle. USDC payout is instant and automatic, with no KYC. Tax treatment depends on your jurisdiction — in the US, gains are usually ordinary income; in the UK, often capital gains. Consult a tax professional for your situation.

FAQ

Is Polymarket legal in my country?

Polymarket is geo-blocked in the US/UK/EU. Actual usage via the Polymarket interface is not possible there. The legal status itself varies — many countries treat prediction markets as a gray area. Polymarket Legal UK has a different geo footprint.

How are winnings taxed?

Tax treatment varies by jurisdiction. In most countries, prediction market gains are treated as ordinary income or capital gains. We cannot provide tax advice — consult a tax professional for your specific situation.

Are prediction markets gambling?

Legally unclear in most jurisdictions. Some interpretations classify them as wagering (gambling regulation applies), others as derivatives (financial regulation applies). There's no global precedent specifically for on-chain prediction markets.

Is there a withdrawal cap?

No platform-side cap. You can withdraw any amount provided KYC is complete. SEPA bank withdrawals over €15,000 trigger additional anti-money-laundering checks (statutory obligation for all platforms).

What if regulation changes?

If regulation changes in your jurisdiction (e.g. prediction markets are banned), Polymarket Legal UK would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.