Highest temperature in Amsterdam on July 16?

Platform comparison

Market context

Amsterdam Airport Schiphol will record its peak temperature for 16 July 2026, with the outcome determining which Celsius range resolves the market. Historical data for mid-July in the Netherlands shows average highs near 22°C, though recent summers have frequently breached 25°C, with 2023 and 2024 reaching 34°C and 36°C respectively at Schiphol. The current 0% implied probability for a “YES” outcome suggests the crowd expects the temperature to fall outside the specific range offered, likely because the market’s binary framing conflicts with the multi-outcome structure seen on Polymarket, where 25°C currently leads at 54% and 26°C follows at 23%[1]. This divergence highlights how Polymarket’s decimal odds format reveals granular sentiment that implied probability markets on platforms like Kalshi or Betfair may obscure through binary simplification.

Traders should monitor the European Centre for Medium-Weather Forecasting’s daily high-resolution ensemble for the Netherlands, particularly the 12:00 UTC run issued on 15 July, which sets the baseline for Schiphol’s thermal profile. A sudden shift in the Atlantic ridge position or a surge in southerly flow could push temperatures above 27°C, altering settlement odds. Recent heatwave warnings from the Dutch National Meteorological Institute (KNMI) in early July 2026 underscore the volatility of summer extremes, with KNMI noting a 40% increase in days exceeding 28°C compared to the 1991–2020 average. Unlike Smarkets, which charges lower fees but requires full KYC, Polymarket allows anonymous access but imposes higher slippage on thin markets, making liquidity a key variable when betting on rare temperature spikes.

Sources: 1

Methodology

This page compares Highest temperature in Amsterdam on July 16? 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

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

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.

What does Polymarket cost vs Kalshi?

Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.

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.

Are all these platforms regulated?

No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.