Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Germany Legal) Pick polygram.ink (preferred broker) |
39% | 61% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | View on Polymarket → |
Polymarket (direct) polymarket.com |
39% | 61% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | View on Polymarket → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | View on Polymarket → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | View on Polymarket → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | View on Polymarket → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 29°C | 39% |
| 28°C | 32% |
| 30°C | 19% |
| 27°C | 6% |
| 31°C | 3% |
| 32°C | 1% |
| 24°C or below | 0% |
| 25°C | 0% |
| 26°C | 0% |
| 33°C | 0% |
| 34°C or higher | 0% |
Market context
On 28 July 2026, the Hong Kong Observatory will record the day's maximum temperature in degrees Celsius to one decimal place. This market resolves based on that official reading, published in the Observatory's Daily Extract dataset once finalised. The settlement window closes at 12:00 UTC on that date, though resolution may be delayed pending data publication from the source authority.
Hong Kong's July temperatures are historically consistent, with daily maxima typically ranging between 32 and 35 degrees Celsius during the summer monsoon season. The 0% crowd probability suggests traders are either uncertain about which temperature band will occur, or the market has insufficient liquidity to establish meaningful odds. Historical records show July rarely produces extreme outliers; the Observatory's 30-year climate normals place the average daily maximum at approximately 32.5 degrees Celsius for this month. Comparable July days in recent years have clustered within narrow bands, making extreme readings above 36 degrees or below 31 degrees relatively uncommon.
From a regulatory standpoint, this weather market operates under different frameworks depending on trader jurisdiction. The German GlüStV (Glücksspielstaatsvertrag) classifies prediction markets as gaming activities subject to licensing requirements; traders in Germany should verify their platform's regulatory status. US CFTC oversight applies to certain derivatives contracts but typically exempts non-leveraged prediction markets under $1,500 notional value per position—a threshold that affects accessibility for retail participants. The "no-KYC up to $1,500" framework common in decentralised prediction platforms means traders can participate without identity verification below that stake level, though this varies by jurisdiction and platform. Traders should confirm their local regulatory environment before participating, as temperature derivatives fall into grey areas across multiple regimes.
Methodology
This overview of Highest temperature in Hong Kong on July 28? 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 Germany Legal has a different geo footprint.
- What happens during a tax audit?
- You're responsible for documenting your trades. Polymarket Germany Legal exports a full transaction history (CSV/PDF) for tax reporting. In an audit you'll need to present these documents.
- 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 Germany Legal would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.
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