Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Is Kalshi Legal in California) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Go to the live market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Go to the live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Go to the live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Go to the live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Go to the live market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 80-81°F | 100% |
| 71°F or below | 0% |
| 72-73°F | 0% |
| 74-75°F | 0% |
| 76-77°F | 0% |
| 78-79°F | 0% |
| 82-83°F | 0% |
| 84-85°F | 0% |
| 86-87°F | 0% |
| 88-89°F | 0% |
| 90°F or higher | 0% |
Market context
The real-world event is the **highest temperature recorded at LaGuardia Airport on 23 July 2026**, with the market settling to the Wunderground daily high for that station. At the time of writing, the crowd has priced **80–81°F** as the frontrunner at **72%**, with **82–83°F** next at **19%**, so the market is already treating a late-day move into the low 80s as the main uncertainty rather than an extreme heat outcome.[1]
For context, this is a straightforward summer temperature contract, but the current **0% YES** implied probability for the specific position should be read with caution because the market outcome is determined by a single station reading, not by broader New York City conditions. In practice, these contracts often track the day’s forecast range tightly until the morning and early afternoon, then shift only if cloud cover, sea-breeze timing, or a weak convective disturbance changes the expected high by a degree or two. The comparison point is less about long-run climate averages than about how often New York’s airport reading lands in a narrow band, especially when the prevailing forecast is already clustered around the low 80s.[1]
From a market-access angle, the main frictions are regulatory rather than meteorological. For German users, the GlüStV framework can limit access to online gambling-style products, so availability may depend on how the platform classifies the contract and the user’s jurisdiction. In the US, the CFTC’s reach matters because event contracts that resemble derivatives can draw federal scrutiny, even when the underlying event is a weather reading. “No-KYC up to $1,500” typically means a user can transact below that threshold without full identity verification, which lowers onboarding friction for small positions, but it does not remove geo-restrictions, local legal limits, or the exchange’s own compliance checks for this particular market.
Sources: 1
Methodology
This overview of Highest temperature in NYC on July 23? 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 Legal in California 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.
- What happens during a tax audit?
- You're responsible for documenting your trades. Is Kalshi Legal in California 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).
- What if regulation changes?
- If regulation changes in your jurisdiction (e.g. prediction markets are banned), Is Kalshi Legal in California would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.
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