Highest temperature in Seoul on July 4?

Platform comparison

Market context

On 4 July 2026, the market resolves to the highest temperature recorded at Incheon International Airport, with the crowd currently assigning zero probability to a 29°C peak. This 0% YES stance clashes with historical patterns: July in South Korea is typically hot and humid, with daily highs often nearing 30°C and feeling like over 34°C due to moisture, while the average high sits around 25–27°C[2][5]. Although the monsoon season brings frequent rain, clear days can still produce sharp temperature spikes, and recent records show South Korea hitting 41.2°C in July 2025, proving extreme heat is possible even in a rainy month[9]. The current probability likely reflects a specific bracket mismatch rather than a belief that 29°C is impossible.

Traders should monitor the Korea Meteorological Administration’s short-range forecasts for shower intensity and precipitation probability, as rain can suppress peaks while post-rain sun exposure drives rapid warming[4]. The timing of the Sinchon Water Gun Festival (4–12 July) may also influence local humidity and crowd activity, though its direct thermal impact is minimal[2]. Crucially, the market’s book depth depends on funding flows: deposit friction via Klarna, SEPA, or USDC rails determines how quickly capital enters the book, and withdrawal delays can stall new positions. Recent news from Al Jazeera highlights South Korea’s record-breaking tropical nights, suggesting traders may be underweighting extreme heat scenarios despite the 0% crowd signal[9].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Highest temperature in Seoul on July 4? with a focus on payment rails and deposit friction. Polymarket accepts USDC on Polygon only; Kalshi only ACH/Plaid (US only); Betfair card/SEPA in EU/UK; Manifold no deposit. Polymarket Klarna UK additionally offers Klarna and SOFORT as fiat on-ramps to USDC. Live odds reflect the Polymarket order book.

Resolution & payout

Settlement path determines payout latency. Polymarket settles on-chain (USDC, minutes). Broker frontends like Polymarket Klarna UK add Klarna/SOFORT as fiat withdrawal options with T+1 processing. Kalshi: USD via ACH (T+1 to T+3). Betfair: local currency via card/SEPA (T+1 to T+5).

FAQ

How does Klarna deposit work on Polymarket Klarna UK?

You enter the deposit amount in EUR/GBP, choose Klarna as the method, run through Klarna's standard authentication (Pay Later or Direct Bank Transfer), and Polymarket Klarna UK converts internally to USDC for the Polymarket order book. Processing: typically under 30 minutes.

What does SOFORT cost as a deposit method?

Polymarket Klarna UK charges no fees for SOFORT. The only cost is the internal FX spread (typically <1%) on EUR→USDC conversion. SOFORT itself has no end-user fees — the platform absorbs acquirer costs.

How fast is SEPA deposit?

SEPA Instant: under 10 seconds. SEPA Standard: 1-2 business days. Both accepted fee-free; the internal USDC conversion runs automatically once EUR lands in the platform account.

Can I deposit with a credit card?

Yes, Visa and Mastercard. Credit card deposits carry a ~2.5% acquirer surcharge (standard for card payments). Apple Pay and Google Pay run on the same card rails — same surcharge.

Are payment details protected?

Yes. Card and bank details are never stored by Polymarket Klarna UK — they pass directly through PCI-DSS compliant payment service providers (Adyen, Stripe). Polymarket Klarna UK retains only transaction IDs and Klarna reference numbers for reconciliation.