Highest temperature in Amsterdam on July 30?

Platform comparison

Market context

Amsterdam Airport Schiphol’s hottest reading on 30 July will settle this market, so the practical question is whether the day’s peak lands in the mid-to-high twenties, or whether a brief warm spell pushes it into the low thirties. Amsterdam’s July climate is typically mild, with average highs around 22°C and a mean near 18°C, while recent long-run references show extreme summer spikes are possible but unusual, with the city’s record highs clustered in the mid-30s °C rather than the low 30s every year.[8][9][10]

That history matters because a 0% crowd-implied probability for the top-end ranges does not mean impossibility; it usually reflects a view that Schiphol will not reach the upper bins unless synoptic conditions turn decisively warm and dry. For programmatic traders, the useful workflow is to monitor the live temperature path and compare it against the market’s discrete brackets, because a single afternoon maximum can move the outcome even if the morning looks benign. Historical July data in Amsterdam also show that day-to-day highs often sit close to the low-to-mid 20s°C, which is consistent with the market’s current concentration in the midrange outcomes.[2][5][9]

Catalysts are mostly weather-model driven rather than event-driven: the key inputs are changes in forecast maximums, cloud cover, wind direction and any incoming warm fronts over north-western Europe. A bot or conditional-order setup would usually key off updated model runs and radar nowcasts, then map those forecasts to the market’s Celsius bands before the settlement window closes at 12:00 UTC. For the eventual result, Wunderground’s Amsterdam Airport Schiphol history page is the settlement source, so the final print from that station is what matters, not city-centre observations or broader regional averages.[1]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Amsterdam on July 30? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Polymarket Review UK, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

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 Polymarket Review UK. 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.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.