Highest temperature in Milan on July 21?

Platform comparison

Market context

The highest temperature recorded at Milan's Malpensa International Airport on 21 July 2026 will determine the settlement outcome for this market, with resolution sourced from Weather Underground's historical data for that specific station and date. The settlement window closes at midday UTC, capturing the full calendar day's temperature range across all recorded times.

Milan's July climate typically produces daily highs between 28–32°C, though heat waves can push readings into the mid-to-high 30s. Historical precedent from comparable European cities suggests that extreme heat events—those exceeding 35°C—occur roughly once every three to five years during summer months. The 0% crowd-implied probability currently assigned suggests traders are either heavily discounting the likelihood of extreme heat on this particular date or the market has attracted minimal liquidity; neither condition necessarily reflects meteorological likelihood. Cross-platform comparison data from sportsbook weather derivatives and other prediction markets would clarify whether this represents genuine consensus or thin-market pricing distortion.

Key catalysts for traders include seasonal weather pattern forecasts released by European meteorological services in early July 2026, which typically offer reliable guidance for mid-month conditions. Atlantic pressure systems and North African high-pressure ridges drive Milan's summer temperatures; any unusual blocking patterns or heat dome formation would shift probabilities materially. Real-time monitoring of extended-range forecasts from ECMWF and national weather services in the fortnight before settlement will provide actionable signals for position adjustments.

Methodology

We track Highest temperature in Milan on July 21? 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

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.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.