Highest temperature in Milan on July 31?

Platform comparison

Market context

Polymarket currently prices this Milan heat contract at **0% YES**, which means the market is assigning no visible chance that the highest temperature at Malpensa Airport on 31 July 2026 lands in the YES range. The market settles on the highest reading reported for that day at the Malpensa Intl Airport Station, with the result taken from Wunderground and converted into the relevant temperature band on Polygon using USDC-backed conditional tokens.

For context, Milan’s late-July climate is firmly hot but not automatically extreme: long-run July average highs sit around 29–30°C, while record summer spikes can reach the high 30s Celsius, including 40°C in the city on 30 July 2026 according to historical weather summaries. That makes a broad upper-temperature outcome plausible in principle, but the exact airport reading matters more than city-centre headlines, because airport conditions can differ from urban heat estimates. Wunderground’s own history pages and Milan climate records show that July highs commonly cluster in the high 20s to low 30s Celsius, with heatwaves driving the tail risk.

A trader should watch the local forecast evolution, especially the timing and intensity of any late-day heat build-up, plus cloud cover, sea-breeze penetration and thunderstorm chances that can cap the day’s maximum. Short-horizon updates from weather services are the key dependency here, because the contract only cares about the single highest temperature observed before the settlement window closes. If forecasters keep maxima below the market’s target band, the 0% pricing is consistent with a low-probability tail rather than a mere underestimate of ordinary summer warmth.

Sources: 1 · 2 · 3 · 4 · 5

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

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.

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.

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.