Highest temperature in London on June 28?

Platform comparison

Market context

The real-world event in question is the peak temperature recorded at London City Airport on 28 June 2026, a date that falls squarely within the UK’s warm season which typically runs from mid-June to early September. Historical data shows that London City Airport averages daily highs above 25°C during this period, with the warmest month often reaching 29–30°C under sunny intervals and light winds[1][5]. Recent records confirm that Kew Gardens in southwest London hit 26.6°C on 24 June 2026, marking the hottest day of the year so far, while forecasts for 28 June predicted temperatures up to 30°C with sunny conditions[1][7]. These comparable cases suggest that a 0% crowd-implied probability for a high-temperature outcome is statistically inconsistent with seasonal norms and recent weather patterns.

Traders should monitor upcoming Met Office announcements and local weather schedules, particularly any updates on heatwave intensity or thunderstorm activity that could suppress peak temperatures. The Telegraph recently reported that lightning and torrential downpours swept London after days of extreme heat, indicating volatile weather shifts that may cap maximum readings despite earlier highs[10]. Additionally, the UK has been braced for record-breaking temperatures of up to 40°C in late June, though actual outcomes at EGLC may differ due to coastal influences and urban microclimates[8]. The market’s traction is closely tied to funding flows from payment rails like Klarna and SEPA, as deposit friction and fee structures directly influence book depth and trading volume on platforms such as Polymarket-Klarna.co.uk.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Highest temperature in London on June 28? 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.

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.

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).

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.