Highest temperature in Amsterdam on August 16?

Platform comparison

Market context

Amsterdam's highest temperature on 16 August 2026 will be measured at Schiphol Airport and resolved against Weather Underground's Daily Observations table, the stricter of two available data sources on that platform. The market currently shows 0% implied probability, suggesting traders expect temperatures to fall outside whatever range this particular contract specifies—though the exact threshold boundaries are not detailed in the market description.

Historical August temperatures in Amsterdam cluster between 18–24°C on average, with record highs around 30°C during heat waves. The 2022 European summer saw Amsterdam reach 35.5°C in mid-August, whilst cooler years have peaked at 20–22°C. This variance explains why temperature markets on different platforms diverge sharply: Polymarket's decimal odds structure can express fractional probabilities more granularly than Kalshi's fixed-range approach, and Betfair's lay-betting mechanics allow traders to express scepticism about extreme outcomes differently than Smarkets' binary framework. The current 0% reading likely reflects either an extremely narrow range definition or a threshold well above historical norms.

Traders monitoring this contract should track European weather forecasting updates from mid-August 2025 onwards, particularly Atlantic pressure systems and jet-stream positioning that drive summer temperatures across the Low Countries. The KNMI (Royal Netherlands Meteorological Institute) publishes extended forecasts 10–14 days ahead; any early-season heat dome warnings would shift market expectations. Settlement depends entirely on Wunderground's Daily Observations feed rather than summary figures, a distinction that matters when automated weather stations and manual readings diverge—a known source of discrepancy on that platform.

Methodology

We read Highest temperature in Amsterdam on August 16? from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live mid is the canonical probability; the side-by-side columns benchmark fees, KYC, settlement currency and deposit rails so you can choose the venue that fits your jurisdiction and trade size.

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.

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.

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.

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 is accessible globally?

Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Robinhood Prediction Markets has a different geo footprint and routes to Polymarket's order book at 0% fees.