Highest temperature in Amsterdam on August 14?

Platform comparison

Market context

On 14 August 2026, the highest temperature recorded at Amsterdam Airport Schiphol Station will determine this market's outcome. Resolution hinges on the Daily Observations table from Weather Underground rather than summary figures, a distinction that matters when intraday peaks diverge from reported highs. The settlement window closes at midday UTC on that date, meaning afternoon temperature spikes after 12:00 will not be captured.

Historical August temperatures at Schiphol show a median daily high around 21–23°C, with extremes ranging from 16°C to 32°C over the past three decades. The 0% crowd probability suggests traders are pricing in either a systematic misunderstanding of the resolution mechanics or confidence that no extreme heat event will occur. August 2025 saw a European heatwave, but seasonal forecasting remains inherently uncertain at a 20-month horizon. Comparable single-day temperature markets typically see probability mass distributed across a 3–5°C range rather than concentrated at zero, indicating this market's current odds may reflect low liquidity or a data-entry anomaly rather than genuine market conviction.

Traders should monitor the European Centre for Medium-Range Weather Forecasts (ECMWF) seasonal outlook, updated monthly, which flags whether summer 2026 is expected to trend warmer or cooler than climatological norms. The Dutch Royal Meteorological Institute (KNMI) publishes detailed historical station data; cross-referencing Schiphol's August records against the specific resolution source (Wunderground's Daily Observations table) before trading is essential, as discrepancies between weather services occasionally arise. No regulatory KYC threshold applies to this market under German GlüStV or US CFTC frameworks when traded on compliant platforms, though accessibility rules vary by jurisdiction.

Methodology

This overview of Highest temperature in Amsterdam on August 14? 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 Legit 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.

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), Is Kalshi Legit would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.