Pronóstico: Highest temperature in Milan on July 15?

Platform comparison

Market context

On 15 July 2026, the highest temperature recorded at Milan’s Malpensa International Airport will determine the outcome of a weather contract trading on Polymarket. Today, the market shows a stark divergence: while the crowd-implied probability for a “YES” resolution sits at 100%, the actual frontrunner outcome is “32°C or below” at 50%, with “33°C” next at 33% [1]. This suggests traders are betting on a specific temperature band rather than a binary yes/no, and the 100% YES figure likely reflects a misalignment in how the market interface displays conditional token probabilities versus the underlying resolution ranges.

Historically, Milan in July sees average highs of 29°C, with 18% of days featuring rain and moderate humidity around 58% [2]. Temperatures exceeding 33°C are possible but not typical, making the current 50% weighting on “32°C or below” a cautious stance against extreme heat. Comparable summers in the region show that while heatwaves can push temperatures above 35°C, they are usually short-lived and often followed by cloud cover or precipitation, which aligns with the market’s hesitation to price in higher ranges.

Traders should monitor daily Wunderground updates for the Malpensa station, as this is the official resolution source [1]. Key catalysts include regional weather forecasts from the Italian Meteorological Service and any sudden shifts in Mediterranean air patterns that could trigger a heat spike. With settlement ending at 12:00 UTC on 15 July 2026, positions in USDC on the Polygon network will resolve based on the single highest recorded Celsius value, making real-time data tracking essential for managing conditional token exposure.

Sources: 1 · 2

Methodology

We track Pronóstico: 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

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'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 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.