Highest temperature in Madrid on August 2?

Platform comparison

Market context

The settlement question is the **highest temperature recorded at Madrid-Barajas Airport** on 2 August, not the city-wide forecast, so a programmatic approach should key off the airport station’s intraday observations on Wunderground and wait for the final daily maximum before sizing exposure. Current public forecasts for Madrid point to a hot, mostly dry day, with highs around **35–36°C** and little rain, which makes the upper-30s outcomes plausible but not the base case.[1][3][11]

The market’s **0% YES** crowd signal is best read as a liquidity or interface artefact rather than a literal statement about the weather, because the published market page itself is already assigning meaningful weight to the hotter bins, with **36°C** and **37°C** leading at **48%** and **44%** respectively.[5] For a bot or copy-trading workflow, the useful comparison is not whether Madrid is hot in summer, but whether the airport station tends to print one degree above or below headline forecasts; that matters because a one-degree miss shifts resolution into a different bracket, and the market explicitly allows revisions only until the next day’s first datapoint is published.[5]

Traders should watch for late-afternoon convective changes, updated municipal or regional warnings, and any adjustment to the subtropical ridge pattern driving Iberian heat, since these can move the realised airport maximum even when the city forecast looks stable.[14][20] Reuters reported earlier in the season that Madrid had already faced 40°C heat during Spain’s first official heatwave, underscoring how quickly central Spain can overshoot model guidance when the large-scale pattern locks in.[14]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Madrid on August 2? 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

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.

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.