Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open live market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 25°C | 100% |
| 19°C or below | 0% |
| 20°C | 0% |
| 21°C | 0% |
| 22°C | 0% |
| 23°C | 0% |
| 24°C | 0% |
| 26°C | 0% |
| 27°C | 0% |
| 28°C | 0% |
| 29°C or higher | 0% |
Market context
The market asks for the highest temperature recorded at Munich Airport on 6 July 2026, with settlement in USDC and resolution tied to Wunderground data. Despite the current crowd-implied probability of 0% for a "YES" outcome on a specific range, historical patterns suggest a different reality. Early July highs in Munich typically cluster between 23°C and 27°C, rarely falling below 61°F or exceeding 87°F[6]. Recent Polymarket activity shows 26°C as the frontrunner at 52%, while Lines.com assigns 33.5% to 25°C, indicating the market expects a warm day rather than a cold one[1][3]. Yesterday’s market for 5 July settled at 26°C with 100% certainty, reinforcing the trend of mid-summer warmth in the region[2].
Traders should monitor real-time weather feeds from the National Weather Service and BBC Weather for deviations, as sudden cloud cover or wind shifts could alter the peak temperature[4][5]. While no specific crypto announcements directly influence this weather contract, macro volatility in BTC and ETH could impact liquidity on the exchange, affecting funding rates and whale flows into prediction markets. Exchange spot prices and on-chain funding rates remain key indicators for capital allocation, as large holders may shift USDC into weather contracts during periods of crypto market uncertainty. Recent data from Meteostat confirms that Munich Airport’s historical July averages support a high near 25–26°C, making extreme cold unlikely[9]. Any sudden drop in funding rates or a spike in BTC volatility could trigger whale inflows into this market, altering the implied probability distribution.
Methodology
Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.
Resolution & payout
Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.
Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.
FAQ
- What are crypto prediction markets?
- Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.
- What does a transaction cost on Polygon?
- Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.
- Can I use Bitcoin directly?
- No, Polymarket operates exclusively in USDC on Polygon. You can bridge BTC to USDC via an exchange or bridge service and deposit on Polygon — typically 10-30 minutes processing time.
- How does UMA secure the resolution?
- The UMA Optimistic Oracle uses a bond system: a proposer posts a bond, a two-hour challenge window opens. On dispute the losing side forfeits the bond — financial incentive for honest resolution.
- How volatile are crypto prediction markets?
- Crypto markets react to spot prices — a 5% BTC move typically shifts a "BTC above X by date" market 10-20%. Polymarket crypto market liquidity is usually six-figure USD, sufficient for active trading.
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