Highest temperature in Milan on July 21?

Platform comparison

Market context

On 21 July 2026, Milan's highest temperature will be recorded at Malpensa International Airport and assigned to one of several defined ranges. The settlement hinges on Weather Underground's historical data for that specific station, with the market currently showing zero probability across all temperature brackets—an unusual state suggesting either incomplete market seeding or genuine uncertainty about which range will ultimately contain the day's peak.

Milan's July temperatures typically range between 24°C and 32°C, with occasional peaks above 33°C during heat waves. Historical data from comparable years shows that extreme heat events (35°C+) occur roughly once every five to seven years in midsummer, whilst moderate conditions (28–31°C) represent the modal outcome. The 0% crowd probability across all ranges reflects the market's nascent state rather than any consensus view; comparable weather markets on established platforms usually show distributed probabilities weighted towards historical seasonal norms before settlement approaches.

Traders should monitor European weather forecasting updates from mid-July, particularly from ECMWF and national meteorological services, which typically issue reliable ten-day outlooks five to seven days before the event. Any significant heat dome or Atlantic ridge positioning over southern Europe in early July would shift expectations upward. Malpensa's location in the Lombardy plain, away from Alpine cooling influences, makes it susceptible to continental heat accumulation during high-pressure systems. The settlement window closes at noon UTC on 21 July, meaning morning forecasts will be the final reliable catalyst before resolution becomes dependent on actual observed conditions.

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Best Prediction Markets, which mirrors the Polymarket order book directly.

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 does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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.