Highest temperature in Hong Kong on August 21?

Platform comparison

Market context

On 21 August 2026, the Hong Kong Observatory will record the day's highest temperature in degrees Celsius. This market resolves to whichever temperature band contains that single daily maximum reading, published in the Observatory's official Daily Extract once data is finalised. The settlement window closes at midday UTC on that date, though resolution cannot occur until the Observatory publishes its final figures, typically within 24–48 hours of the observation period ending.

August is Hong Kong's hottest month on average, with daily maxima typically ranging from 31 to 34 degrees Celsius, though readings above 35 degrees occur roughly once per decade during extreme heat episodes. The 0% crowd probability suggests traders are either awaiting clearer range definitions or treating this as a placeholder pending the market's full activation. Historical data from the Observatory shows that whilst sustained heat waves are rare, single-day peaks of 36–37 degrees have been recorded in late August during El Niño years and periods of anomalous atmospheric stagnation. Comparable August markets from prior years provide limited direct precedent, as prediction markets on specific daily weather observations remain relatively sparse in Hong Kong's regulated environment.

From a regulatory standpoint, this market's accessibility depends on jurisdiction. Under German GlüStV rules, weather derivatives fall outside betting classification, permitting broader participation. US CFTC oversight applies to certain weather contracts but typically exempts small-notional, cash-settled prediction markets. The "no-KYC up to $1,500" threshold common on iskalshilegit.com means traders can participate without identity verification provided their cumulative exposure remains modest, though this threshold varies by regulatory regime and should be confirmed against your local jurisdiction before trading.

Methodology

This overview of Highest temperature in Hong Kong on August 21? 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. Is Kalshi Legit has a different geo footprint.

Can I trade anonymously?

Pseudonymously, yes — up to the KYC threshold. Is Kalshi Legit stores an email address and wallet addresses rather than a legal name. Over $1,500 lifetime volume triggers KYC, after which identity is no longer anonymous.

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), Is Kalshi Legit would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.