Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Tax UK) Pick polygram.ink (preferred broker) |
79% | 21% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
79% | 21% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Trade this market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Trade this market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Trade this market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Trade this market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 25°C | 79% |
| 26°C | 13% |
| 27°C | 7% |
| 20°C or below | 0% |
| 21°C | 0% |
| 22°C | 0% |
| 23°C | 0% |
| 24°C | 0% |
| 28°C | 0% |
| 29°C | 0% |
| 30°C or higher | 0% |
Market context
The underlying event is the peak temperature recorded at Incheon International Airport on 9 July 2026, a date falling squarely within South Korea’s monsoon season when daily highs typically approach 30°C but humidity can push the felt temperature above 34°C[1][2]. Historical precedents show that while July is the rainiest month with frequent short, heavy downpours, clear sunny days can still produce extreme heat; notably, Seoul recently hit 37.8°C in early July, marking the highest early-July temperature ever recorded for the capital[7]. This recent record suggests that a 0% crowd-implied probability for a specific high-temperature range may be overly conservative if the monsoon breaks temporarily, as comparable cases indicate that heatwaves can still occur despite the general wet pattern[1][6].
Traders should monitor the Korea Meteorological Administration’s short-range forecasts for shifts in precipitation probability and wind direction, as a sudden drop in rainfall chance combined with light southwest winds could trigger a rapid temperature spike[3][9]. Recent reports indicate temperatures are already rising to 30–32°C with strong sunshine expected over the weekend, a trend that could persist into the settlement date if the monsoon front stalls or retreats[9]. The Sinchon Water Gun Festival in late July, while not on the settlement date, signals the broader seasonal context of intense summer activity and heat in Seoul, reinforcing the need to watch for any sudden weather system changes that could alter the temperature trajectory[1].
From a regulatory perspective, this market’s accessibility is shaped by the German Glücksspielstaatsvertrag (GlüStV) which increasingly restricts unlicensed prediction markets, alongside the US CFTC’s reach over derivatives trading that may classify such bets as illegal if not KYC-compliant[1]. However, the “no-KYC up to $1,500” threshold offers a critical loophole for retail participants, allowing them to access this specific weather market without identity verification provided their stake remains below that limit, effectively bypassing immediate regulatory hurdles while maintaining operational compliance under current tax frameworks for polymarket-tax.co.uk.
Methodology
This overview of Highest temperature in Seoul on July 9? 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
- Do I need to KYC for Polymarket Tax UK?
- Not for lifetime trading volume under $1,500. Above that threshold, a quick KYC flow kicks in — ID, selfie, approximately 5-10 minutes. The threshold matches FATF travel standards for unregulated crypto platforms.
- Can I trade anonymously?
- Pseudonymously, yes — up to the KYC threshold. Polymarket Tax UK stores an email address and wallet addresses rather than a legal name. Over $1,500 lifetime volume triggers KYC, after which identity is no longer anonymous.
- What happens during a tax audit?
- You're responsible for documenting your trades. Polymarket Tax UK 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), Polymarket Tax UK would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.
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