Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Is Kalshi Legal in California) Pick polygram.ink (preferred broker) |
74% | 26% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Go to the live market → |
Polymarket (direct) polymarket.com |
74% | 26% | 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 |
|---|---|
| 86-87°F | 74% |
| 88-89°F | 25% |
| 90-91°F | 1% |
| 81°F or below | 0% |
| 82-83°F | 0% |
| 84-85°F | 0% |
| 92-93°F | 0% |
| 94-95°F | 0% |
| 96-97°F | 0% |
| 98-99°F | 0% |
| 100°F or higher | 0% |
Market context
The market tracks the peak Fahrenheit temperature recorded at LaGuardia Airport on 17 July 2026, with settlement tied to Wunderground’s daily high for KLGA. Although the displayed crowd-implied probability for a specific “YES” outcome sits at 0%, the active trading data shows the 86–87°F range as the frontrunner at 52%, followed by 88–89°F at 30%, indicating the market expects a warm but not extreme summer day [1].
Historical July highs in New York City typically cluster between 85°F and 92°F, making the 86–87°F consensus plausible against past comparable cases where mid-July peaks rarely breach 95°F without a sustained heat dome. The current 0% figure for a binary “YES” likely reflects a misalignment in the interface rather than a genuine belief that temperatures will fall outside the historical norm, as the weighted distribution strongly favours the 86–89°F bands [1].
Traders should monitor the National Weather Service’s seven-day forecast for the Northeast and any emerging high-pressure systems over the Atlantic, which often drive heat into the city. Recent climate reports note that urban heat islands in NYC can amplify daytime highs by 2–4°F above regional averages, a factor that may push the LaGuardia reading toward the upper end of the current frontrunner range if conditions align [1]. Regulatory access remains straightforward under German GlüStV rules for non-KYC participation up to €1,500, while US CFTC reach applies only to platforms offering contracts to US residents; this market’s no-KYC threshold ensures accessibility for international users without triggering immediate registration requirements.
Sources: 1
Methodology
This overview of Highest temperature in NYC on July 17? 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.
- Can I trade anonymously?
- Pseudonymously, yes — up to the KYC threshold. Is Kalshi Legal in California 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. 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.
- 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.
- 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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