Highest temperature in Milan on August 20?

Platform comparison

Market context

On 20 August 2026, the highest temperature recorded at Milan Malpensa International Airport will determine which temperature band wins this market. The crowd currently assigns zero probability to any outcome, suggesting either incomplete market participation or uncertainty about how to price seasonal weather variation in northern Italy.

Milan's August temperatures have historically clustered in the 28–32°C range, with occasional peaks above 33°C during heat waves. The city experienced a maximum of 37.0°C in August 2003 and 36.4°C in August 2022, both during broader European heat events. The 0% implied probability across all ranges appears misaligned with climatological precedent; even conservative estimates would place mid-to-high 20s outcomes as near-certainties, whilst ranges above 35°C carry non-trivial but minority likelihood. The settlement mechanism's reliance on Weather Underground's Daily Observations table rather than summary figures introduces a technical dependency worth noting, as real-time station data occasionally diverges from rounded daily highs.

European summer weather patterns for 2026 remain subject to Atlantic oscillation dynamics and Mediterranean high-pressure systems that typically intensify in late August. The North Atlantic Oscillation index and sea-surface temperature anomalies in June and July will provide early signals for whether Milan faces a cooler-than-average or heat-wave-prone August. Traders should monitor European weather forecasting updates from mid-July onwards, particularly from Meteo-France and the UK Met Office, which publish extended-range outlooks. The current zero-probability pricing suggests the market awaits initial participation before meaningful odds emerge.

Methodology

We track Highest temperature in Milan on August 20? 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

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 Who Will Win 2026. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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.