Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Best Prediction Markets UK) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | View on Polymarket → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | View on Polymarket → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | View on Polymarket → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | View on Polymarket → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | View on Polymarket → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 34°C | 100% |
| 31°C or below | 0% |
| 32°C | 0% |
| 33°C | 0% |
| 35°C | 0% |
| 36°C | 0% |
| 37°C | 0% |
| 38°C | 0% |
| 39°C | 0% |
| 40°C | 0% |
| 41°C or higher | 0% |
Market context
Milan’s hottest reading at Malpensa on 2 August is trading as a low-conviction summer temperature call, with the crowd implying **0% for YES** in the market header, even though the contract ladder on Polymarket currently clusters around the mid-30s Celsius rather than around a single exact figure.[2] That looks inconsistent with the market’s own live pricing, where 34°C is shown as the leading outcome at 33%, followed by 35°C at 27% and 33°C at 26%.[2] Against a resolution source that keys off the day’s *highest* airport temperature, the practical takeaway is that the contract is really about whether Milan manages a cleanly hot afternoon rather than whether it merely posts a warm daily average.[2]
Historically, August in Milan tends to sit much lower than the current pricing suggests: long-run guides cluster daytime highs around 28–29°C, with nights near 19–20°C, which means a 33–35°C outcome would require a meaningful overshoot versus normal seasonal conditions.[1][9][10][14] That said, traders are not pricing the climate average alone; they are weighting the possibility of an exceptionally hot synoptic pattern, and recent European heatwave coverage has repeatedly shown Milan can spike well above its monthly norm when persistent high pressure sets in.[8] On that basis, the analyst-style read is that the market’s implied distribution is much warmer than climatology, while the sportsbook-style angle would normally price a materially more tempered high unless a specific heat event is locked in.
What matters now is whether the forecast and airport observations confirm that warmth before the Wunderground settlement cut-off at noon UTC, because the contract resolves to the highest recorded temperature on the day and revisions only count until the first datapoint for the following date appears.[2] If cloud cover, convective showers or a sea-breeze-type moderation cap the peak at a lower band, the current 34–35°C cluster becomes vulnerable; if the Po Valley heat dome holds and nearby forecasts are right, the upper-30s outcomes can still attract late repricing.[2][4] At this stage, the meaningful divergence is between the live market’s hot-strip bias and the zero-per-cent headline implied probability shown on the contract page.[2]
Methodology
This page reviews Highest temperature in Milan on August 2? 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 Best Prediction Markets UK, which mirrors the Polymarket order book at 0% fees.
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
- 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 Best Prediction Markets 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.
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