Highest temperature in Amsterdam on July 30?

Platform comparison

Market context

Amsterdam Airport Schiphol’s afternoon maximum is the variable here, and the market is pricing an unusually sharp split in the mid-20s: the crowd-implied probability is 0% YES, while the live book still shows 25°C and 26°C as the joint favourites at 21% each, with 27°C and 23°C also clustered near the top.[1] In handicapper terms, that makes the *favourite* range the low-to-mid 20s, but the *underdog* tail is not dead if the day trends warmer than expected.

The historical frame is straightforward: Amsterdam’s July climate is typically mild, with average highs around 21–22°C and a July daily high near 22°C on climatology pages, while the month’s extremes can occasionally reach the low 30s.[5][9][10] That means a 25°C-plus outcome is warmer than the long-run norm but not an outlier, so the main question is whether today behaves like a standard summer day or gets a brief warm surge. On that basis, consensus sits around the mid-20s, while value for contrarian buyers tends to live in the higher bins if the forecast language or recent observations point to a late-day rise.

The main catalysts are the near-term weather inputs: cloud cover, wind direction, and whether any showers keep the airport capped below the consensus band. Schiphol resolution depends on the highest temperature recorded there on 30 July, so traders should watch airport-specific observations rather than broader Amsterdam city forecasts, which can diverge by a degree or two.[1] As of now, the market’s implied shape suggests the book is still treating 25–26°C as the base case, with 27°C as the cleaner contrarian angle if updated forecasts raise the daytime ceiling.[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 Who Will Win 2026, 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

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 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 Who Will Win 2026 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.