Highest temperature in Munich on August 17?

Platform comparison

Market context

Munich’s temperature profile for today was revised lower over the last 24 hours, with the latest forecasts centring on a maximum around 21°C and a fairly wet, unsettled day rather than a clear warm-up. That matters for this market because the settlement source is the hourly or daily observation record at Munich Airport, so the final outcome depends on the actual peak recorded before the midday UTC cut-off, not the headline high shown elsewhere.

That 0% crowd price implies a strong assumption that the airport never gets into the upper 20s, but August in Munich can still produce short-lived spikes when cloud breaks early, particularly before showers build. Comparable August sessions at the airport have often settled in the low- to mid-20s Celsius, with hotter outcomes requiring stronger sun and lighter precipitation than are currently indicated.

Traders should watch the timing of rain and thunderstorms, since any morning or late-morning convective burst can cap the day’s high quickly, while a delayed frontal passage would leave more room for a brief overshoot. The key dependency is the observed sequence at Munich Airport before 12:00 UTC, and recent model guidance has pointed to considerable cloudiness, rain and a thunderstorm risk through the day, which leans towards a contained peak rather than an extreme reading.

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

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.

UK Frequently Asked Questions

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.

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%.