Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Is Kalshi Legit) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | See live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | See live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | See live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | See live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | See live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 39°C | 100% |
| 34°C or below | 0% |
| 35°C | 0% |
| 36°C | 0% |
| 37°C | 0% |
| 38°C | 0% |
| 40°C | 0% |
| 41°C | 0% |
| 42°C | 0% |
| 43°C | 0% |
| 44°C or higher | 0% |
Market context
The key event is the **highest temperature recorded at Madrid–Barajas Airport on 22 July**, with settlement tied to the day’s peak reading rather than a citywide average. With the crowd putting **39°C** well ahead, the market is pricing in a hot but not extreme outcome, while **40°C** remains the main upside risk if midday heating runs a little stronger than expected.[1][2]
That probability sits in the context of a familiar Madrid summer pattern: forecasts for today already point to a maximum of **39°C** and **0%** rain, which is consistent with a market leaning towards the forecast number rather than a meaningful overshoot.[2] For readers comparing across jurisdictions, the regulatory frame matters as much as the weather. A German-facing venue can be affected by **GlüStV**-linked restrictions on access and advertising, while a US-facing venue can still attract **CFTC** attention if the event is treated as a derivative-style contract rather than pure entertainment. “**No-KYC up to $1,500**” generally means a user can access the market with limited identity checks until cumulative activity crosses that threshold, after which fuller verification is required; that affects frictions, not the underlying settlement rule.
The main catalysts are the short-term Madrid forecast updates, any heatwave advisories, and the intraday temperature path at Barajas, since settlement depends on the single highest reading reached before the window closes.[2] Traders should also watch for forecast revisions from Spanish weather outlets and any airport-station data glitches, because a one-degree move between **39°C** and **40°C** changes the market’s likely bucket. The current price already reflects a strong expectation of sustained heat, but the balance between cloud cover, local winds, and timing of the day’s peak remains the practical determinant of where the final reading lands.[1][2]
Methodology
This overview of Highest temperature in Madrid on July 22? reviews the four comparable platforms from a regulatory perspective: which is accessible in your jurisdiction, where KYC kicks in, how the platform is classified by your country of residence. Live probability is the Polymarket mid; comparison columns show regulatory status, KYC thresholds and settlement options for each platform.
Resolution & payout
On Polymarket, resolution runs on-chain via UMA Optimistic Oracle. USDC payout is instant and automatic, with no KYC. Tax treatment depends on your jurisdiction — in the US, gains are usually ordinary income; in the UK, often capital gains. Consult a tax professional for your situation.
FAQ
- Is Polymarket legal in my country?
- Polymarket is geo-blocked in the US/UK/EU. Actual usage via the Polymarket interface is not possible there. The legal status itself varies — many countries treat prediction markets as a gray area. Is Kalshi Legit has a different geo footprint.
- How are winnings taxed?
- Tax treatment varies by jurisdiction. In most countries, prediction market gains are treated as ordinary income or capital gains. We cannot provide tax advice — consult a tax professional for your specific situation.
- What happens during a tax audit?
- You're responsible for documenting your trades. Is Kalshi Legit exports a full transaction history (CSV/PDF) for tax reporting. In an audit you'll need to present these documents.
- Is there a withdrawal cap?
- No platform-side cap. You can withdraw any amount provided KYC is complete. SEPA bank withdrawals over €15,000 trigger additional anti-money-laundering checks (statutory obligation for all platforms).
- What if regulation changes?
- If regulation changes in your jurisdiction (e.g. prediction markets are banned), Is Kalshi Legit would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.
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