Highest temperature in Milan on July 21?

Platform comparison

Market context

Milan's peak temperature on 21 July 2026 will be measured at Malpensa International Airport's official weather station and resolved against historical records from Wunderground. The settlement window closes at midday UTC, capturing the full diurnal cycle for that date. This represents a straightforward meteorological observation with no discretionary interpretation required—the highest recorded temperature in Celsius becomes the binding outcome.

Historical July temperatures at Malpensa reveal a consistent pattern. The airport station has recorded peaks between 28–35°C during mid-to-late July over the past two decades, with occasional excursions to 36–37°C during heat waves. The 0% crowd probability suggests traders are either awaiting clearer seasonal forecasts or treating this as a calibration exercise. Comparable Italian airport stations show similar July distributions, with extreme heat events (38°C+) occurring roughly once per decade. The current flat probability distribution indicates genuine uncertainty rather than consensus dismissal.

Traders monitoring this market should track European weather model consensus from mid-July 2026, particularly ECMWF and GFS outputs issued 10–14 days prior to settlement. Anomalous heat patterns across the Mediterranean typically correlate with high-pressure systems anchored over southern Europe; such systems are identifiable in medium-range forecasts. Wunderground's historical archive updates daily, allowing programmatic verification of competing temperature ranges as the date approaches. Conditional orders tied to forecast thresholds—triggering positions when models show sustained 35°C+ probabilities—offer a systematic entry framework for this event.

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

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 Polymarket Bot 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.

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.

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 Polymarket Bot UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.