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 fall into one of several defined ranges. Polymarket currently prices all temperature brackets at near-zero probability across the board, reflecting either minimal liquidity in this particular contract or genuine uncertainty about settlement mechanics rather than the underlying meteorological event. The market resolves using Wunderground's historical weather database for the specific station, with settlement occurring at midday on the day itself.

Milan's July temperatures have historically clustered between 28–32°C, with occasional peaks above 35°C during heat waves. The city experienced 37°C on 11 July 2023 during an intense European heat event, whilst July 2022 saw sustained temperatures in the low-to-mid 30s. The long-term average high for mid-July sits around 29°C, though climate patterns have shifted towards more frequent excursions into the 33–36°C band over the past decade. These historical ranges provide the baseline against which the market's temperature brackets should be evaluated.

Traders monitoring this contract should track European weather forecasting updates from mid-July 2026, particularly from Météo-France and the European Centre for Medium-Range Weather Forecasts, which typically issue reliable 10-day outlooks. Broader atmospheric patterns—including the position of high-pressure systems over the Mediterranean and any Atlantic disturbances—will determine whether Milan experiences typical summer conditions or an anomalous heat episode. The settlement window closes at noon local time, meaning morning forecasts become critical for final positioning.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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 Kalshi 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 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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Kalshi UK 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.