Highest temperature in Istanbul on July 4?

Platform comparison

Market context

The underlying event is the highest temperature recorded at Istanbul Airport on 4 July 2026, with NOAA data determining the outcome in degrees Celsius. Historical climatology frames the current 0% probability for extreme heat as a misreading of typical conditions; July highs in Istanbul usually range between 25°C and 29°C, rarely exceeding 32°C or falling below 23°C[2][4]. While Turkey recently recorded an all-time high of 50.5°C during a July heatwave, such extremes are outliers rather than norms for early July in the city[5][7]. Ensemble forecasts currently point to a 26°C maximum with 97% confidence, suggesting the market is pricing in moderate, predictable warmth rather than record-breaking anomalies[1].

Traders should monitor the release of NOAA’s daily time-series data for Istanbul Airport, which serves as the sole resolution source, and watch for any sudden shifts in northerly flow patterns that could suppress temperatures[1]. Recent reports confirm July 2025 was Earth’s third-hottest on record, with Turkey hitting a national peak, yet early July 2026 forecasts remain stable near 25–27°C due to prevailing northerly winds[1][7]. The market’s traction correlates directly with funding flows from payment rails like Klarna and SEPA; deeper liquidity on these on-ramps drives book depth, allowing larger positions to be taken without significant slippage. As deposit fees and withdrawal rails influence user participation, the book’s resilience hinges on seamless integration with USDC and fiat gateways, ensuring sustained volume even as settlement nears.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Highest temperature in Istanbul 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

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.

Which payment methods are supported?

Klarna (Pay Now / Pay Later), SOFORT, SEPA bank transfer, credit card (Visa/Mastercard), Apple Pay, Google Pay, and direct USDC deposit on Polygon. Availability depends on your jurisdiction.

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.

What's the minimum deposit?

10 EUR / 10 USD equivalent. No upper limit, but deposits over $1,500 lifetime volume trigger a quick KYC flow (typically 5-10 minutes).

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.