Highest temperature in Milan on August 20?

Platform comparison

Market context

On 20 August 2026, Milan's highest temperature will be measured at Malpensa International Airport, with traders betting on which temperature band it will fall into. In prediction markets, a YES share pays out if the outcome occurs; a NO share pays out if it doesn't. Here, traders select a specific temperature range—say, 28–30°C—and profit if the actual high lands there. The market currently shows 0% probability for YES, meaning the crowd assigns negligible odds to whatever range this particular market covers, though other temperature bands presumably carry distributed probability across the full forecast spectrum.

Milan's August climate is reliably warm but not extreme by Mediterranean standards. Historical data from Malpensa shows August highs typically range from 26–30°C, with occasional peaks above 32°C during heat waves. The 2023 European summer saw several Italian cities exceed 35°C in August, though Milan's airport station—positioned in the Lombardy plain—tends to record slightly cooler readings than central city locations. The 0% crowd probability suggests either the selected range sits well outside historical norms or traders have already concentrated their bets elsewhere.

The primary variable affecting resolution is European weather patterns in mid-August 2026. Traders should monitor seasonal forecasts from June onwards, particularly whether Atlantic systems bring cooler air masses into northern Italy or whether high-pressure systems from North Africa dominate. The Italian meteorological service (Servizio Meteorologico dell'Aeronautica Militare) publishes monthly outlooks; these, alongside broader European forecasts, will shape expectations as summer approaches. Wunderground's historical station data at Malpensa provides the definitive settlement source, making data consistency the only administrative risk.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

UK Frequently Asked Questions

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

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.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.