Highest temperature in Madrid on August 16?

Platform comparison

Market context

The highest daily temperature recorded at Madrid-Barajas Airport on 16 August 2026 will determine this market's settlement, with resolution sourced from Weather Underground's Daily Observations table rather than summary figures. The current crowd-implied probability of 0% suggests traders are pricing in either exceptionally cool conditions or uncertainty about which temperature range will materialise on that specific date.

Madrid's August temperatures historically cluster in the 32–38°C range, with daily highs regularly exceeding 35°C during mid-August. The 0% probability across prediction markets contrasts sharply with the city's established climate patterns; comparable August dates in recent years have consistently produced temperatures well above typical summer baselines. This divergence warrants scrutiny—either the market is pricing an unusually cool August 2026 or traders are avoiding the contract due to settlement specification concerns rather than meteorological reasoning.

The primary catalyst affecting this market's trajectory is the European summer weather pattern forecast, typically clarified by mid-July 2026 through extended-range models from Météo-France and the UK Met Office. Traders should monitor Atlantic blocking patterns and North African heat dome positioning in the weeks preceding the settlement window, as these systems drive Madrid's August extremes. The reliance on Weather Underground's specific Daily Observations table—rather than airport official records or alternative weather services—creates a secondary dependency; any platform data inconsistencies or reporting delays could complicate settlement verification closer to the August date.

Methodology

We track Highest temperature in Madrid on August 16? 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

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

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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 Best Prediction Markets trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.