Highest temperature in London on July 3?

Platform comparison

Market context

The real-world event at stake is the highest temperature recorded at London City Airport on 3 July 2026, measured in degrees Celsius and resolved via Wunderground data. Current crowd-implied probability for the highest range sits at 0% YES, suggesting traders believe extreme heat is unlikely despite July being London’s hottest month on average, with a historical mean high of 72°F (22°C) [6]. Recent forecasts for July 2026 indicate daily highs between 71°F and 87°F (21°C–31°C), with overnight lows from 53°F to 69°F (12°C–21°C) [7]. Today’s observed high at London City Airport is 26°C (79°F), with a “feels like” of 27°C [1][2], which aligns with typical midsummer conditions but falls below the upper forecast band, reinforcing the market’s scepticism about record-breaking heat.

Traders should monitor upcoming Met Office daily updates and any sudden shifts in southerly wind patterns, which can elevate temperatures significantly. The Met Office currently forecasts a maximum feels-like temperature of 24°C for today, with gusts up to 21mph [8], slightly below the observed 26°C, indicating potential volatility in short-term readings. While no major climate announcements are scheduled, the persistence of a long-duration heat event in nearby regions, as noted by Environment Canada for London, ON, could signal broader atmospheric trends affecting the UK [9]. Thin volume and forecast precision continue to shape pricing in related markets, such as the low-temperature contract on Lines.com, where 15°C holds at 45.5% after an 8.5% surge [4]. These dynamics reflect how funding flows from deposit rails like Klarna and SEPA directly influence book depth and price sensitivity in this prediction market.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Highest temperature in London on July 3? 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.

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.

How do withdrawals work?

Identical methods in reverse. SEPA withdrawal: T+1 (standard) or under 10 seconds (SEPA Instant). Klarna withdrawals process via bank-account refund. USDC withdrawal to external wallet: Polygon gas cost (typically $0.01).

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.