Highest temperature in Milan on August 20?

Platform comparison

Market context

On 20 August 2026, the highest temperature recorded at Milan's Malpensa International Airport will determine the settlement range for this market. The crowd currently assigns zero probability to any outcome, suggesting either insufficient trader participation or genuine uncertainty about which temperature band will occur. Resolution will depend on the Daily Observations table from Weather Underground rather than summary figures, a distinction that matters when intraday peaks diverge from reported highs.

Milan's August climate is characteristically warm, with historical August averages around 28°C and extremes regularly exceeding 32°C. The city experienced a peak of 37.8°C in August 2003 during the European heat wave, though more typical August highs cluster between 30–34°C. Recent summers have shown volatility: August 2022 saw temperatures above 35°C for extended periods, whilst August 2024 remained closer to seasonal norms. This historical range suggests the market's zero probability reflects incomplete information rather than an implausible outcome.

Traders should monitor European weather patterns through July 2026, particularly the position of high-pressure systems over the Mediterranean and any early-season heat dome forecasts. The North Atlantic Oscillation and soil moisture conditions across southern Europe will influence whether August 2026 tracks toward cooler or hotter extremes. Malpensa's airport location, slightly north of central Milan, typically records marginally cooler readings than the city centre, a factor worth considering when assessing which temperature band becomes most likely as the settlement date approaches.

Methodology

This page reviews Highest temperature in Milan on August 20? 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 Who Will Win, which mirrors the Polymarket order book at 0% fees.

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

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 Who Will Win. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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%.