Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Legal 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 |
|---|---|
| 24°C | 100% |
| 18°C or below | 0% |
| 19°C | 0% |
| 20°C | 0% |
| 21°C | 0% |
| 22°C | 0% |
| 23°C | 0% |
| 25°C | 0% |
| 26°C | 0% |
| 27°C | 0% |
| 28°C or higher | 0% |
Market context
Amsterdam Airport Schiphol’s highest temperature on 31 July will be the settlement point, and the current 0% YES price implies the market is treating an extreme reading as very unlikely rather than impossible. Amsterdam’s July climate is usually moderate: long-run normals cluster around the low 20s Celsius, with typical daily highs near 22°C and only occasional spikes much above that[8][11][13]. Comparable historical summaries show Amsterdam’s hottest July readings are far above average but still rare, with a cited all-time July extreme of 32°C and an Amsterdam record of 36.4°C in late July 2019, which is useful context for judging how far out of line a very hot settlement would be[10][14].
For traders, the immediate drivers are short-term forecast updates, any local maritime or north-westerly airflow changes, and the day’s actual high as reported at Schiphol rather than central Amsterdam. Forecast pages for 31 July have pointed to highs in the mid-to-high 20s Celsius, which would sit well above the monthly norm but below the levels needed to challenge historical city records[3]. Because the source is Wunderground’s Schiphol history page, late-day temperature peaks and the station’s exact hourly maximum matter more than general city averages; a warm afternoon can still settle below a widely shared forecast if cloud cover, wind or timing limit the station maximum[3][12].
From a market-access angle, German GlüStV rules can affect whether residents can legally use a given platform, while US CFTC reach is relevant where a product is considered within US regulatory scope; that matters here because the event is a weather outcome rather than a pure sports or politics contract. The “no-KYC up to $1,500” framing means smaller positions may be available with lighter identity checks, but it does not remove geofencing, sanctions screening or any jurisdiction-based restrictions on access to this specific market.
Methodology
This overview of Highest temperature in Amsterdam on July 31? 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 Legal UK has a different geo footprint.
- Do I need to KYC for Polymarket Legal UK?
- Not for lifetime trading volume under $1,500. Above that threshold, a quick KYC flow kicks in — ID, selfie, approximately 5-10 minutes. The threshold matches FATF travel standards for unregulated crypto platforms.
- 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 Legal UK would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.
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