Highest temperature in Milan on July 15?

Platform comparison

Market context

The market tracks the peak Celsius temperature recorded at Milan’s Malpensa International Airport on 15 July 2026, with settlement dependent on Wunderground’s daily high for that station. Current crowd-implied probability sits at 100% YES for an outcome, though the frontrunner on Polymarket is actually “32°C or below” at 50%, with “33°C” next at 33% [1]. This divergence suggests the YES label may refer to a binary threshold not fully aligned with the displayed range probabilities, or the market interface is showing a preliminary state before full resolution logic is applied.

Historically, Milan’s July highs average 29°C, with a 18% chance of rain and moderate humidity around 58% [2]. Temperatures exceeding 33°C are possible but less typical; the 32°C-or-below lead reflects this baseline climatology. Programmatic traders should model this as a bounded normal distribution centred near 29°C, with volatility driven by regional heatwaves. A bot evaluating this would fetch historical LIMC station data, apply a rolling 10-year July 15 high, and simulate outcomes using Monte Carlo methods weighted by current atmospheric pressure trends.

Key catalysts include the European Centre for Medium-Range Weather Forecasts (ECMWF) 7-day ensemble runs, which update daily and can shift probability if a heat advection event is forecasted. Traders should monitor the Italian National Meteorological Service’s daily bulletins for Malpensa, particularly any mention of “bolide di calore” (heat dome) formations. A recent update from the Regional Environmental Protection Agency of Lombardy noted elevated soil temperatures across the Po Valley, a precursor to higher daytime peaks [2]. Conditional orders should trigger if the 3-day forecast exceeds 34°C, as this would invalidate the current 50% probability for the lower range.

Sources: 1 · 2

Methodology

We track Highest temperature in Milan on July 15? 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

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

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.

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 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.