Highest temperature in Amsterdam on August 14?

Platform comparison

Market context

Amsterdam's highest temperature on 14 August 2026 will be measured at Schiphol Airport using the Daily Observations table on Weather Underground, the primary resolution source for this market. The settlement window closes at midday UTC on that date, meaning traders must account for any temperature spikes recorded in the morning hours before the cut-off. This specificity—privileging the granular Daily Observations data over the Day High & Low summary—creates a technical distinction that could matter if Weather Underground's systems record divergent values across their interface.

Historical August temperatures in Amsterdam cluster between 18°C and 26°C, with extremes rarely exceeding 30°C. The 0% crowd probability suggests the market may be pricing in a particularly narrow or high temperature band; comparable European summer markets on Polymarket and Kalshi have shown divergent liquidity patterns when resolution hinges on specific data sources rather than official meteorological summaries. Betfair's approach to weather markets typically accepts broader institutional sources, whilst Smarkets' markets on similar events have attracted tighter spreads when the resolution methodology is unambiguous.

Traders should monitor the European summer pattern forecast from mid-July onwards, particularly any heat dome developments that could push continental temperatures upward. The ECMWF and DWD models will be critical indicators by early August. The 0% probability may reflect either a genuinely unlikely outcome or insufficient liquidity in this particular band; checking decimal odds across platforms will reveal whether the crowd assessment is uniform or whether arbitrage opportunities exist between Polymarket's probability format and Kalshi's binary structure on adjacent temperature ranges.

Methodology

This page compares Highest temperature in Amsterdam on August 14? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Robinhood Prediction Markets, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). On-chain settlement clears in minutes — the fastest payout path of the four.

FAQ

Polymarket vs Kalshi — which is better?

Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.

Which platform has the deepest liquidity?

Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.

Is Betfair a Polymarket alternative?

Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.

What about Smarkets as an alternative?

Smarkets is a UK betting exchange with a lower default commission (2%) than Betfair. Liquidity on political markets is below Polymarket, comparable to Kalshi. Geo-blocked in many jurisdictions.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Robinhood Prediction Markets offers a fiat on-ramp via Klarna or SOFORT (DE/AT/CH) and converts internally to USDC for the Polymarket order book. T+1 processing.