Highest temperature in Amsterdam on August 16?

Platform comparison

Market context

Amsterdam Airport Schiphol will record its highest temperature on 16 August 2026, measured via the Daily Observations table on Weather Underground rather than summary figures. The settlement window closes at midday UTC, meaning the full day's heating cycle will be captured before resolution. Current pricing on Polymarket reflects 0% probability across all temperature bands, suggesting either extreme confidence in a specific outcome or minimal liquidity in this niche weather contract at present.

August temperatures in Amsterdam historically cluster between 18–24°C, with occasional peaks above 25°C during heat waves. The 2003 European heat wave saw Amsterdam reach 30°C in mid-August, whilst more typical recent years have produced highs of 22–23°C. The 0% crowd probability likely indicates traders are waiting for seasonal forecasts closer to the date or expect a narrow temperature band to dominate the market once liquidity deepens. Weather Underground's Daily Observations table, the specified resolution source, occasionally diverges from airport summary data due to measurement timing and methodology differences, creating a technical arbitrage consideration for those monitoring both feeds.

The Royal Netherlands Meteorological Institute (KNMI) issues extended forecasts in early August that will shape trader positioning. Any Atlantic weather systems or high-pressure systems tracking towards northern Europe in mid-August could shift expectations materially. Traders should monitor KNMI's 10–14 day outlook released around 2–3 August 2026, as this typically drives initial conditional token positioning on Polygon-based weather markets. Historical volatility in August forecasts for the Netherlands suggests significant probability shifts are plausible once deterministic models converge.

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket Scam?, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

UK Frequently Asked Questions

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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%.