Highest temperature in Milan on August 10?

Platform comparison

Market context

Milan has just come through another very hot spell, and the latest observations still point to an elevated afternoon maximum rather than an early cool-down. Weather Underground’s Milan history page shows a recent daily high of **95°F** against a historic average high of **87°F**, while nearby official observations from Milano/Linate yesterday peaked above **36°C**, reinforcing that the broader Lombardy basin is still in a summer heat regime.[2][17]

For comparison, Milan’s August climate normally centres on the high 20s Celsius, with long-run average highs around **28°C–30°C** and occasional spikes well into the mid-30s or above.[3][7][11] Recent August data also show that the city can oscillate between a conventional warm day and a heatwave day very quickly, which helps explain why the market is not pricing a certainty even though the current crowd-implied probability is zero.[1][4][13]

The main catalysts are the same ones traders will be watching through the day: the evolution of the local temperature curve into the afternoon, any change in cloud cover or convective activity, and whether the station’s *Daily Observations* table prints a value above the current warm-season norm before the settlement cut-off. Because this market resolves on the highest temperature in Weather Underground’s *Daily Observations* for Malpensa Intl Airport Station, the exact peak reading matters more than the summary high/low box, and late-day updates can still shift the outcome materially.[2]

Sources: 1 · 2 · 3 · 4 · 5

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

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.

UK Frequently Asked Questions

Is this market available outside the US?

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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.

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%.