Highest temperature in Amsterdam on August 15?

Platform comparison

Market context

The settlement hinges on the maximum temperature recorded in Amsterdam Airport Schiphol's Daily Observations table on 15 August 2026, measured in Celsius. Weather Underground's granular observation data—not the rounded Day High & Low summary—will determine the outcome. The current 0% crowd probability suggests traders are pricing in either exceptionally cool conditions or uncertainty about the specific temperature band being wagered.

Amsterdam's August climate typically peaks between 22–25°C, with historical extremes rarely exceeding 30°C. The 15 August date falls within the summer plateau when continental European heat patterns stabilise. Comparable August days at Schiphol over the past two decades show a median high around 23°C, with outliers reaching 28–29°C during heat waves. The 0% probability may reflect either a market consensus that the settlement range is implausibly high, or thin liquidity in a niche weather contract with a two-year settlement window.

Traders should monitor European summer weather forecasting updates as August 2026 approaches, particularly Atlantic pressure systems and any heat dome formation across the continent. The NOAA Climate Prediction Center's seasonal outlooks and Meteo-France advisories typically signal anomalous heat patterns 4–6 weeks in advance. Settlement precision depends entirely on Wunderground's data availability and station uptime; any outages or sensor recalibration at Schiphol could create resolution disputes. USDC settlement mechanics mean traders holding positions should track contract specifications closely, as temperature bands are discrete and non-overlapping.

Methodology

This page reads Highest temperature in Amsterdam on August 15? on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

UK Frequently Asked Questions

Why USDC and not ETH or USDT?

USDC is the Polygon standard — audited reserves (Circle, monthly attestation), deepest order book, low gas costs. ETH volatility would distort probability quotes; USDT has thinner Polygon liquidity than USDC.

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No, Polymarket operates exclusively in USDC on Polygon. You can bridge BTC to USDC via an exchange or bridge service and deposit on Polygon — typically 10-30 minutes processing time.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.