Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Tax UK) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Trade this market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Trade this market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Trade this market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Trade this market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 86-87°F | 100% |
| 71°F or below | 0% |
| 72-73°F | 0% |
| 74-75°F | 0% |
| 76-77°F | 0% |
| 78-79°F | 0% |
| 80-81°F | 0% |
| 82-83°F | 0% |
| 84-85°F | 0% |
| 88-89°F | 0% |
| 90°F or higher | 0% |
Market context
The underlying real-world event is the peak of an unprecedented July 2026 heatwave gripping New York City, where LaGuardia Airport has already shattered historical records with a 104°F reading on July 3, breaking a 60-year-old benchmark by three degrees. This extreme thermal surge, which killed 29 people across New Jersey and lingered into the night with a record 94°F midnight temperature, frames the current 0% crowd-implied probability for a lower range on July 8 as a reaction to the sheer intensity of the preceding days. Historical precedents from this specific corridor show that once such a heat dome establishes, daily highs rarely drop below the 90s until the system collapses, suggesting the market’s zero probability may reflect a misreading of the event’s persistence rather than a cooling trend.
Traders must monitor the National Weather Service’s hourly heat index forecasts and the scheduled release of the July 8 LaGuardia data from Wunderground, as these are the sole dependencies for resolution. A recent weather update from FOX Weather confirms that dangerously high heat index values and oppressive humidity are tightening their grip on the Northeast, with warm overnight temperatures offering little cooling relief, which directly supports the likelihood of the temperature remaining in the highest recorded bracket. The regulatory landscape further complicates accessibility: under Germany’s GlüStV, prediction markets face strict licensing, while the US CFTC’s reach extends to any platform offering contracts to US residents, yet the ‘no-KYC up to $1,500’ threshold allows traders to bypass identity verification for this specific market, provided they remain within the limit. This accessibility, combined with the CFTC’s ambiguous stance on unlicensed climate derivatives, creates a unique environment where the 0% probability may persist despite the physical evidence of extreme heat.
Methodology
This overview of Highest temperature in NYC on July 8? 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 Tax 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.
- Can I trade anonymously?
- Pseudonymously, yes — up to the KYC threshold. Polymarket Tax UK 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.
- What happens during a tax audit?
- You're responsible for documenting your trades. Polymarket Tax UK exports a full transaction history (CSV/PDF) for tax reporting. In an audit you'll need to present these documents.
- 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).
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