Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
96% | 4% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
96% | 4% | 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 |
|---|---|
| 22°C | 96% |
| 23°C | 5% |
| 24°C | 1% |
| 25°C | 1% |
| 18°C or below | 0% |
| 19°C | 0% |
| 20°C | 0% |
| 21°C | 0% |
| 26°C | 0% |
| 27°C | 0% |
| 28°C or higher | 0% |
Market context
The underlying real-world event is the highest temperature recorded at Munich Airport on 1 July 2026, with current short-range European models forecasting a maximum near 22°C[1][10]. Historical data shows Munich’s July highs typically range between 21°C and 26°C, rarely exceeding 37°C except during extreme heatwaves[3][5]. A deadly heatwave in early July 2023 saw Munich hit 38°C, but such spikes are outliers, not norms[3]. The current 0% YES probability implies the market expects the temperature to fall outside the specific range being bet on, likely because 21°C or 22°C are the frontrunners with 77% and 21% odds respectively[1].
Traders should monitor real-time updates from Wunderground and BBC Weather for thundery showers or sudden shifts in wind patterns that could alter the day’s peak temperature[3][10]. Any announcement of a new heatwave or cooler air moving in from the north—similar to the July 2023 event—would be a critical catalyst[3]. On-chain, watch USDC settlement flows and BTC/ETH macro sentiment; if funding rates spike or whale activity surges, it may signal heightened speculation on weather-driven outcomes[1]. Recent crypto data from Polymarket confirms that temperature markets are gaining traction, with 21°C dominating current bets[1].
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.
- 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 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.
- Which crypto markets exist on Polymarket?
- Currently active markets include BTC/ETH/SOL price targets, halving dates, ETF approvals, hard-fork outcomes and Layer-2 TVL thresholds. The list updates weekly; biggest volume sits on BTC and ETH price forecasts.
- Are crypto prediction markets taxable in the US?
- In the US, prediction market gains are typically treated as ordinary income or short-term capital gains depending on holding period. Consult a tax professional for your specific situation — we cannot provide tax advice.
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