Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Who Will Win) Pick polygram.ink (preferred broker) |
33% | 67% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
33% | 67% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 27°C | 33% |
| 28°C | 26% |
| 26°C | 20% |
| 29°C or higher | 13% |
| 25°C | 8% |
| 24°C | 2% |
| 23°C | 1% |
| 19°C or below | 0% |
| 20°C | 0% |
| 21°C | 0% |
| 22°C | 0% |
Market context
Munich Airport’s **5% to 10%**-type summer heat outcomes are being priced as a long shot here, with the market at **0% YES** implying the crowd sees almost no chance of a very hot reading on 6 August. The reference point is the airport station’s *daily maximum* on that calendar day, so the trade is really about whether the day clears the upper end of Munich’s normal August range rather than whether it feels warm in the city centre.
On the numbers, the favourite is plainly the *middling-summer* band: AccuWeather puts Munich’s early-August highs around **80°F to 81°F** in its month view, which is roughly **27°C**, but broader climate guides place August daytime maxima closer to **22°C to 23°C** on average, with plenty of rain-days mixed in.[1][4][7] That leaves the underdog firmly with the top-end temperature brackets: a high above the usual low- to mid-20s Celsius would need a notably warm, dry afternoon, whereas the consensus baseline is more modest and supports why the market has not assigned the extreme-heat bins any meaningful probability.[2][4][12] In handicapper terms, consensus sits with the *intermediate* ranges, while any value in the far-right tail depends on a genuine late-summer spike.
The main catalyst is the actual forecast evolution into the daytime heating window at Munich Airport, because a cloudier or showery setup can cap the maximum even when the morning starts mild. Current daily guidance is already mixed, with some sources flagging showers or overcast conditions and highs around **20°C to 21°C**, while others show a warmer **26°C**-type peak, so traders should watch how that spread narrows as the day develops.[3][10][14] There are no major scheduled events likely to move the temperature itself; the dependency is almost entirely on local cloud cover, rain timing, and whether the airport site gets a brief clear-sky warm-up before noon.
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.
UK Frequently Asked Questions
- 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. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- 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.
- Is Polymarket legal in the UK?
- Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.
- Do I pay tax on prediction market profits in the UK?
- UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.
- How do I deposit on Polymarket from the UK?
- UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.
Trade Highest temperature in Munich on August 6? on Who Will Win
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