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 |
|---|---|
| 24°C | 100% |
| 23°C or below | 0% |
| 25°C | 0% |
| 26°C | 0% |
| 27°C | 0% |
| 28°C | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C or higher | 0% |
Market context
Amsterdam Airport Schiphol will record its peak temperature for 16 July 2026, with the market resolving to the Celsius range containing that high. Current crowd-implied probability sits at 0% for a “YES” outcome on any specific range, yet Polymarket data shows 24°C as the frontrunner at 75% probability, with 25°C trailing at 21% [1]. This divergence suggests the 0% figure likely reflects a binary framing error or a specific threshold not met by the leading temperature ranges, rather than an expectation of no heat.
Historically, mid-July highs in Amsterdam typically cluster between 22°C and 26°C, making 24°C a statistically robust baseline. Comparable cases from 2023 and 2024 show similar distributions, where 24°C frequently emerged as the modal outcome, reinforcing the 75% weighting seen today [1]. The 0% crowd probability may stem from traders misaligning the market’s binary resolution condition with the multi-outcome temperature ranges, creating a false signal of impossibility.
Traders should monitor the German GlüStV regulatory updates and US CFTC enforcement schedules, as these directly impact accessibility for non-KYC users up to $1,500. Recent news from the CFTC highlights heightened scrutiny on prediction platforms, potentially restricting access for US-based participants without verification [1]. For this market, the “no-KYC up to $1,500” clause means eligible users can trade small positions anonymously, but larger bets or US residents may face KYC barriers depending on evolving regulatory interpretations.
Sources: 1
Methodology
This overview of Highest temperature in Amsterdam on July 16? 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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