Highest temperature in Amsterdam on July 30?

Platform comparison

Market context

The relevant event is the highest temperature recorded at Amsterdam Airport Schiphol on 30 July, as reported in the Wunderground daily history page used for settlement. At 15:00 UTC, the market is already live and the remaining question is whether the day’s maximum has been set in the current observation window; for a programme-driven workflow, the practical task is simply to poll the source page and map the final Celsius value into the market’s outcome bands.

The 0% crowd price is hard to reconcile with Amsterdam’s summer profile. July normals for Amsterdam sit around the low 20s °C, while historical July records are far higher, with Amsterdam’s all-time heat record at 36.4°C in July 2019 and a 35.8°C reading in July 2025, which shows that the city can still produce extreme maxima even if they are uncommon.[8][10] That makes the market sensitive to whether the day behaves like a routine maritime-summer day or a genuine warm spell, rather than to the average July climate alone.[9]

For traders using bots, conditional orders, or copy-trading logic, the key catalysts are the intraday temperature trajectory, cloud cover, wind direction, and any regional heat alerts from Dutch meteorological services, because these are the inputs that typically shift the day’s maximum band. On a live weather market like this, the most useful automation is a rules-based watcher that updates probability once the observed high crosses band boundaries, rather than a static model anchored to monthly averages; if the morning already looked mild, the remaining upside may have been limited, but a late-afternoon surge can still change the settlement band before the close of the observation window.

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 Bot 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 Bot UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Bot UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.