Highest temperature in Amsterdam on August 16?

Platform comparison

Market context

Amsterdam's weather on 16 August 2026 will depend on prevailing atmospheric patterns across northern Europe in mid-summer, with the highest temperature at Schiphol Airport determining the resolution. Current crowd assessment assigns negligible probability to any specific temperature range, suggesting either extreme uncertainty about conditions three years hence or insufficient trader engagement with this particular settlement window.

Historical August temperatures at Amsterdam Airport Schiphol show a median daily high around 22–23°C, with extremes ranging from 30°C on hot days to occasional readings below 15°C during cooler spells. The 0% probability reading across all ranges is atypical for weather markets and likely reflects the extended forecast horizon rather than any meteorological consensus. August typically brings variable conditions across the Netherlands, with Atlantic weather systems competing against continental high-pressure zones; traders should recognise that three-year forecasts carry substantial uncertainty compared to markets settling within days.

The resolution mechanism specifies the Daily Observations table from Weather Underground rather than summary figures, a distinction that occasionally produces discrepancies in recorded highs. Traders monitoring this market should track seasonal climate patterns as 2026 approaches, particularly any emerging signals about Atlantic Oscillation behaviour or European summer circulation anomalies. The settlement window closes at 12:00 UTC on 16 August, meaning the final recorded observation at Schiphol will determine the outcome; any instrumental changes or station relocations announced before that date could affect comparability with historical benchmarks.

Methodology

We track Highest temperature in Amsterdam on August 16? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

UK Frequently Asked Questions

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Prediction Today. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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%.