Highest temperature in Milan on July 21?

Platform comparison

Market context

On 21 July 2026, the highest temperature recorded at Milan's Malpensa International Airport will fall into one of several defined ranges, with settlement determined by historical data from Weather Underground. The current Polymarket pricing reflects near-zero conviction across all temperature brackets, suggesting either genuine uncertainty about summer conditions in northern Italy or sparse liquidity in this specific contract. USDC holders on Polygon can acquire conditional tokens representing their chosen temperature band, with payoff determined by which range ultimately contains the day's peak reading.

Milan's July temperatures have historically clustered in the 28–32°C range, though heat waves regularly push readings into the mid-30s. The summer of 2023 saw several days exceed 34°C across Lombardy, whilst 2022 experienced comparable extremes. July 2026 sits roughly two years forward, making seasonal pattern analysis the primary tool; climate data suggests northern Italy's July baseline has shifted upward by approximately 0.5–1°C over the past decade, though individual daily variance remains substantial. Anomalously cool or warm patterns in June and early July would signal directional pressure on the 21st.

European weather forecasting agencies typically issue reliable 10–14 day outlooks roughly one week before the settlement date. Traders should monitor the European Centre for Medium-Range Weather Forecasts (ECMWF) and national meteorological services for any signals of high-pressure systems or Atlantic disturbances that might influence Lombardy's conditions. Heatwave alerts issued by Italian authorities in mid-July would provide real-time calibration; such warnings typically precede sustained temperature spikes by several days.

Methodology

This page reviews Highest temperature in Milan on July 21? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to PolyGram, which mirrors the Polymarket order book at 0% fees.

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

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.

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.