Highest temperature in Madrid on August 2?

Platform comparison

Market context

Madrid’s airport temperature on 2 August is the underlying event, and the market is currently pricing **0% YES**, which leaves the crowd treating every listed band as effectively a longshot. That makes the favourite/underdog framing especially stark: the consensus is that a high around the mid-30s Celsius is most likely, but the market has not assigned any visible weight to a matching YES outcome, creating a classic dislocation between the weather setup and the displayed price. Forecast coverage for Madrid on the day pointed to a hot, largely dry afternoon, with highs around **35–36°C** to **36°C** under mostly clear skies and light south-westerly winds, which is broadly consistent with the usual August heat profile for the city.[1][3][11]

For historical context, August in Madrid is normally the hottest and driest part of the year, with average daytime highs commonly in the low-to-mid 30s Celsius rather than the low 40s, so the main question is not whether it gets hot, but whether the airport observation lands in the exact settlement band.[7][8][14] That is where the value may sit: if traders are overconfident in a single number, the contrarian angle is that airport maxima can overshoot or undershoot city-centre forecasts by a degree or two, especially on clear, dry days with strong insolation, which can shift the winning band even when the overall weather regime looks settled. Polymarket’s own market snapshot showed **36°C** and **37°C** as the leading outcomes, suggesting consensus around a tight hot range rather than an extreme spike.[6]

The main catalysts are the late-afternoon peak temperature, the exact airport station reading, and any last-minute forecast revisions before the settlement window closes at 12:00 UTC. In practical terms, traders should watch how quickly the day warms through the late morning and whether the high cloud increases enough to cap the maximum below the consensus band; current reporting described sunny to partly cloudy conditions, dry air and no rain threat, which leaves the upside focused on solar heating rather than rainfall disruption.[1][3][10] Reuters also noted earlier in the summer that Spain had already experienced severe early-season heat, reinforcing that the broader pattern was one of elevated summer warmth rather than a cool regime.[13]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Madrid on August 2? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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.

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.